Preface |
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xiii | |
Authors |
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xvii | |
Basic Notations |
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xix | |
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Statement of Eigenvalue Problems. Basic Methods of Their Solution |
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1 | (20) |
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Statement of the Sturm--Liouville Problem |
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1 | (4) |
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Boundary value problem for eigenvalues and eigenfunctions |
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1 | (2) |
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Variational statement of the eigenvalue problem |
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3 | (2) |
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Analytical Methods of Solving the Sturm--Liouville Problem |
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5 | (7) |
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General scheme of analytical solution |
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5 | (4) |
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Reduction to a Fredholm integral equation of the second kind |
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9 | (1) |
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Reduction to a Volterra integral equation of the second kind |
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10 | (2) |
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Solving the Sturm--Liouville Problem by the Method of Regular Perturbations |
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12 | (2) |
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Statement of the perturbed problem |
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12 | (1) |
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Standard procedure of asymptotic expansions |
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12 | (1) |
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Finding the expansion coefficients |
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13 | (1) |
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14 | (1) |
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Numerical Methods for Solving the Sturm--Liouville Problem |
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14 | (7) |
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The Rayleigh--Ritz method |
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15 | (3) |
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Some general facts and remarks pertaining to other numerical methods in the Sturm--Liouville problem |
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18 | (3) |
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The Method of Accelerated Convergence for the Sturm--Liouville Problem |
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21 | (34) |
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Numerical-Analytical Upper and Lower Bounds for Eigenvalues |
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21 | (2) |
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The problem of constructing two-sided estimates |
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21 | (1) |
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Construction and analysis of comparison systems |
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22 | (1) |
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Criterion of Closeness between the First Eigenvalue and its Upper (Lower) Bound. Introduction of a Small Parameter |
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23 | (1) |
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23 | (3) |
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Construction of an equivalent perturbed problem |
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23 | (1) |
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Approximate solution of the perturbed problem |
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24 | (1) |
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Reduction of the correction term to differential form |
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25 | (1) |
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Description of the Method of Accelerated Convergence |
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26 | (1) |
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Some Applications of the Accelerated Convergence Method |
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27 | (2) |
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27 | (1) |
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A method for the calculation of weighted norms |
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28 | (1) |
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The Method of Accelerated Convergence for Higher Eigenvalues |
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29 | (2) |
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An example with the calculation of two eigenvalues |
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29 | (1) |
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Some properties of the procedure of finding subsequent eigenvalues |
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30 | (1) |
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Problems with Boundary Conditions of the Second Kind |
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31 | (1) |
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Construction of a comparison problem |
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31 | (1) |
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Approximate solution of the problem |
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31 | (1) |
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31 | (1) |
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Problems with Boundary Conditions of the Third Kind |
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32 | (5) |
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Statement of the third boundary value problem |
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32 | (1) |
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Construction of a comparison system |
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33 | (1) |
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Solution of the perturbed problem |
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34 | (1) |
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Differential relation between eigenvalues and the interval length |
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35 | (1) |
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The method of accelerated convergence |
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35 | (1) |
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36 | (1) |
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Problems with Periodic Boundary Conditions |
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37 | (10) |
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Statement of the periodic boundary value problem |
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37 | (1) |
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Main properties of the periodic problem |
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37 | (1) |
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Construction of upper bounds |
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38 | (1) |
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Construction of the comparison system |
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38 | (1) |
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Introduction of a small parameter |
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39 | (1) |
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Approximate solution of the perturbed problem |
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40 | (1) |
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The method of accelerated convergence |
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41 | (2) |
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43 | (4) |
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Proof of Convergence of Successive Approximations. Existence Theorem |
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47 | (3) |
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Transformation of the perturbed boundary value problem |
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47 | (1) |
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Proof of convergence of successive approximations |
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48 | (2) |
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Proof of Quadratic Convergence |
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50 | (1) |
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The Method of Hyperaccelerated Convergence |
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51 | (1) |
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Third-order refinement procedure |
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51 | (1) |
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An application of the method of hyperaccelerated convergence |
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52 | (1) |
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Taking into Account Explicit Dependence of Boundary Conditions on Eigenvalues |
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52 | (1) |
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53 | (2) |
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Approximate Analytical Solution of Perturbed Eigenvalue Problems |
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55 | (12) |
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Statement and Analysis of the Perturbed Sturm--Liouville Problem |
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55 | (3) |
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Properties of the perturbed spectrum |
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55 | (1) |
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The problem of secular terms and regularization of the problem |
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56 | (1) |
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57 | (1) |
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Approximate Solution of the Boundary Value Problem |
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58 | (3) |
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Construction of eigenfrequencies and phases of partial vibrations |
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58 | (2) |
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Finding eigenfunctions and the construction of an orthonormal basis |
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60 | (1) |
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61 | (1) |
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Approximation of Functions in Terms of the Approximate Basis |
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61 | (3) |
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The problem of expansion in terms of an approximate basis |
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61 | (2) |
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63 | (1) |
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Applications to Initial Boundary Value Problems |
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64 | (1) |
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64 | (1) |
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64 | (1) |
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65 | (2) |
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Generalized Sturm--Liouville Problem |
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67 | (12) |
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Statement of the Generalized Sturm--Liouville problem |
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67 | (1) |
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Statement of the boundary value problem in differential form |
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67 | (1) |
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67 | (1) |
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Some Sturm--Liouville Problems with Exact Solutions |
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68 | (1) |
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68 | (1) |
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Some basic general properties of solutions |
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68 | (1) |
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Statement of an Auxiliary Variational Problem |
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69 | (1) |
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Variational statement of the problem and its generalization |
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69 | (1) |
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Derivation and analysis of the determining relation |
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69 | (1) |
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Closeness Criterion and the Theory of Perturbations |
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70 | (1) |
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Some properties of the solution of the comparison problem |
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70 | (1) |
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Approximate solution of the perturbed problem |
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71 | (1) |
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The Method of Accelerated Convergence for Generalized Sturm--Liouville Problems |
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71 | (1) |
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72 | (1) |
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Test example for an integrable equation |
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72 | (1) |
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Numerical example; two-sided estimates |
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73 | (1) |
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Generalized Parametric Vibrations |
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73 | (3) |
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Statement of the generalized periodic problem |
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73 | (1) |
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An example illustrating spectral properties |
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74 | (1) |
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General properties of solutions of generalized periodic problems |
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75 | (1) |
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An extended setting of the problem and the procedure of its approximate solution |
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75 | (1) |
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Generalized Boundary Value Problems with Spectral Parameter in Boundary Conditions |
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76 | (1) |
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77 | (2) |
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Asymptotics of Eigenvalues and Eigenfunctions of the Generalized Sturm--Liouville Problem for Higher Vibration Modes |
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79 | (16) |
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General Notions Regarding the Asymptotic Behavior of Eigenvalues Corresponding to Higher Vibration Modes |
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79 | (1) |
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Statement of the generalized problem |
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79 | (1) |
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80 | (1) |
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Application of Asymptotic Methods of the Theory of Nonlinear Vibrations |
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80 | (2) |
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``Amplitude--phase'' variables |
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80 | (1) |
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Approximation of the phase |
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81 | (1) |
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Determination of Eigenfrequencies and Vibration Phases |
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82 | (3) |
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Introduction of intermediate parameters |
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82 | (1) |
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Finding the original quantities |
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83 | (1) |
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Procedure of successive approximations |
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84 | (1) |
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Finding Amplitudes and Shapes of Free Vibrations |
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85 | (2) |
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Approximate calculation of higher mode amplitudes |
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85 | (1) |
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Finding eigenfunctions corresponding to higher modes |
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86 | (1) |
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Other Types of Boundary Value Problems |
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87 | (1) |
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Boundary conditions of the second kind |
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87 | (1) |
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General boundary conditions of the third kind |
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87 | (1) |
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Remarks about generalizations |
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88 | (1) |
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Calculations for Some Specific Mechanical Systems |
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88 | (5) |
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Longitudinal vibrations of an inhomogeneous rectilinear beam |
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88 | (1) |
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Vibrations of an inhomogeneous string |
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89 | (1) |
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Asymptotics of eigenvalues of the Hill problem |
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90 | (1) |
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Spatial vibrations of a satellite |
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91 | (2) |
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93 | (2) |
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Solutions of Fourth-Order Self-Conjugate Problems. Oscillation Properties |
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95 | (14) |
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Statement of a Self-Conjugate Fourth-Order Boundary Value Problem |
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95 | (4) |
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Statement of the problem in differential form. Some remarks |
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95 | (1) |
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Statement of the problem in variational form |
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96 | (1) |
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Introduction of natural physical variables |
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97 | (1) |
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97 | (2) |
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The Method of Sagittary Function. Sturm's Theorems |
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99 | (3) |
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Construction of the characteristic equation and the sagittary function |
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99 | (1) |
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Oscillation properties of the sagittary function |
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100 | (2) |
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Computation Algorithms of the Shooting Method Based on the Sagittary Function |
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102 | (2) |
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Algorithm of shooting with respect to the ordinate |
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102 | (1) |
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Algorithm of shooting with respect to the abscissa |
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103 | (1) |
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104 | (5) |
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105 | (1) |
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Comparison with the results of S. Gould |
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106 | (1) |
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Parametric synthesis for conical beams |
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106 | (3) |
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The Method of Accelerated Convergence for Eigenvalue Problems for Fourth-Order Equations |
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109 | (12) |
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Two-Sided Estimates for Lower Mode Eigenvalues |
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109 | (4) |
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Differential and variational statements of the problem |
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109 | (1) |
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Construction of upper bounds |
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110 | (1) |
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Relation between the upper bound and the length of the interval |
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111 | (2) |
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Construction of lower bounds and two-sided estimates |
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113 | (1) |
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Closeness Criterion and Perturbation Theory |
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113 | (2) |
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Introduction of a small parameter |
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113 | (1) |
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An approximate solution of the perturbed problem |
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114 | (1) |
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The Method of Accelerated Convergence for Fourth-Order Boundary Value Problems |
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115 | (1) |
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A differential relation between the eigenvalue and the length of the interval |
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115 | (1) |
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Algorithm of the accelerated convergence method |
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115 | (1) |
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Other Types of Boundary Conditions |
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116 | (1) |
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Procedure of Continuation in a Parameter |
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117 | (1) |
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117 | (4) |
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General remarks about calculations |
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117 | (1) |
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Test examples with analytically integrable equations |
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118 | (1) |
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Problem of transverse vibrations of an inhomogeneous beam occurring in applications |
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119 | (2) |
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Perturbation Method in Eigenvalue Problems for Fourth-Order Equations |
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121 | (12) |
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Reduction of the Original Problem to the Standard Perturbed Boundary Value Problem |
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121 | (3) |
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Statement of the initial boundary value problem; preliminary remarks |
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121 | (2) |
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Reduction to perturbed boundary value problems |
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123 | (1) |
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Some features of the standard procedure of the perturbation method |
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123 | (1) |
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Regularization of the Perturbation Method |
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124 | (4) |
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Transformation of the independent variable |
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124 | (1) |
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Regular procedure of the perturbation method |
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125 | (1) |
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Justification of the perturbation method |
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126 | (2) |
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128 | (1) |
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Finding the Eigenvalues and the Eigenfunctions in the First Approximation |
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128 | (3) |
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131 | (2) |
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Sturm--Liouville Problems for Vector-Valued Functions |
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133 | (8) |
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Setting of the Problem. Preliminary Remarks |
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133 | (1) |
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Statement of the problem in differential form |
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133 | (1) |
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Variational statement of the problem |
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133 | (1) |
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Closeness Criterion and Perturbation Theory |
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134 | (2) |
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Construction of the comparison problem; analysis of its properties |
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134 | (1) |
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Introduction of a small parameter |
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135 | (1) |
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Approximate solution of the problem |
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135 | (1) |
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The Method of Accelerated Convergence for the Sturm--Liouville Problem for Vector-Valued Functions |
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136 | (2) |
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Properties of the first approximation of the solution |
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136 | (1) |
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Algorithm of accelerated convergence for vector problems |
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137 | (1) |
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138 | (1) |
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138 | (1) |
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A system with periodic coefficients |
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139 | (1) |
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139 | (2) |
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Vibrations and Stability of Elastic Systems |
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141 | (20) |
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Plane Vibrations of a Rotating Heavy Thread and Their Stability |
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141 | (11) |
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Statement of the initial boundary value problem. Its solution by the Fourier method |
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141 | (4) |
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Free vibrations of a rotating heavy homogeneous string subjected to tension |
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145 | (4) |
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Vibrations of an inhomogeneous thread |
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149 | (3) |
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Parametric Synthesis in the Problem of Instability of an Inhomogeneous Beam |
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152 | (5) |
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Setting of the problem of longitudinal bending of an elastic beam |
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152 | (2) |
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Calculation of the critical force for some rigidity distributions |
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154 | (3) |
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The Problem of Lateral Buckling of a Long Beam with Narrow Cross-Section |
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157 | (1) |
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Statement of the Prandtl problem |
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157 | (1) |
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A numerical-analytical solution |
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157 | (1) |
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Longitudinal Vibrations of an Inhomogeneous Beam with Transverse Inertia |
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158 | (2) |
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Approaches of Rayleigh and Love |
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158 | (2) |
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Experimental determination of Poisson's ratio on the basis of measurements of longitudinal frequencies by the resonance method |
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160 | (1) |
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160 | (1) |
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Surface and Internal Waves in Heavy Ideal Fluid |
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161 | (18) |
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Free Vibrations of the Surface of a Rotating Spherical Layer of Heavy Fluid |
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161 | (9) |
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Preliminary remarks and statement of the problem |
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161 | (2) |
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Solving the eigenvalue problem |
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163 | (3) |
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Calculation results and their analysis |
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166 | (4) |
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Internal Waves in Essentially Inhomogeneous Fluids |
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170 | (7) |
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Statement of the problem and some mathematical aspects of its solution |
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170 | (2) |
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A version of the perturbation method for approximate solution of the Sturm--Liouville Problem |
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172 | (3) |
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Calculations for some specific stratified fluids |
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175 | (2) |
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177 | (2) |
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Parametric Vibrations of One-Dimensional Systems |
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179 | (8) |
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Parametric Vibrations of Systems of Hill's Type |
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179 | (5) |
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179 | (1) |
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180 | (1) |
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Numerical-analytical analysis |
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181 | (1) |
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Vibrations of crankshafts |
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182 | (2) |
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Stability of Plane Vibrations and Rotations of a Satellite on a Circular Orbit |
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184 | (2) |
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184 | (1) |
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Results of numerical-analytical investigation |
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185 | (1) |
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186 | (1) |
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Vibrations of a Distributed Inhomogeneous System in a Rectangular Domain |
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187 | (14) |
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Vibrations of an Inhomogeneous Membrane |
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187 | (2) |
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Statement of the initial boundary value problem |
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187 | (1) |
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188 | (1) |
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Scheme of the Construction of a Solution of the Membrane Eigenvalue Problem |
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189 | (2) |
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Separation of spatial variables |
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189 | (1) |
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Structural properties of eigenvalues and eigenfunctions |
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189 | (2) |
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Method of Accelerated Convergence |
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191 | (3) |
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Two-parameter scheme of solution |
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191 | (1) |
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Introduction of small parameters |
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191 | (1) |
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A parallel scheme of the algorithm of accelerated convergence |
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192 | (1) |
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Numerical-graphical solution of the problem |
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193 | (1) |
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Iterative refinement procedure |
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193 | (1) |
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194 | (2) |
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Perturbation of the surface density function |
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194 | (1) |
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Nonuniform membrane tension |
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195 | (1) |
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The presence of elastic environment |
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195 | (1) |
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Taking into account perturbations of general form |
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196 | (1) |
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196 | (4) |
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Inhomogeneity with respect to one coordinate |
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196 | (1) |
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197 | (1) |
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Multicoordinate approximation |
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198 | (2) |
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200 | (1) |
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Free Vibrations of a Rectangular Membrane with Sharply Varying Surface Density |
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201 | (14) |
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Statement of the Problem of Free Vibrations of an Inhomogeneous Rectangular Membrane |
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201 | (2) |
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201 | (1) |
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Statement of the boundary value problem |
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202 | (1) |
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Construction of the Generating Solution |
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203 | (1) |
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Separation of the variables in the unperturbed problem |
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203 | (1) |
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A scheme for the construction of the generating solution |
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203 | (1) |
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Membrane Model with Sharply Changing Surface Density |
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204 | (4) |
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Approximation of the density function |
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204 | (1) |
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Brief description of the algorithm |
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205 | (2) |
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207 | (1) |
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Calculation Results and Conclusions |
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208 | (7) |
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Calculation results for the symmetrical cross |
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209 | (1) |
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Calculation results of the shifted cross |
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210 | (1) |
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Calculation results for the nonsymmetric cross |
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211 | (1) |
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212 | (3) |
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Free Vibrations of Elastic Systems in Elliptic Domains |
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215 | (18) |
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Free Vibrations of a Homogeneous Elliptic Membrane |
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215 | (12) |
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Preliminary remarks regarding the present state of the investigations |
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215 | (1) |
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216 | (1) |
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Variational approach and the construction of highly precise estimates |
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217 | (5) |
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Construction of approximate analytical expressions for eigenvalues of elliptic membranes with small eccentricity |
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222 | (1) |
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Asymptotic expansions of eigenvalues for large eccentricity values |
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223 | (2) |
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Finding eigenfrequencies and vibration shapes of an elliptic membrane by the method of accelerated convergence |
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225 | (1) |
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226 | (1) |
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Free Vibrations of an Elliptic Plate with Clamped Edge |
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227 | (5) |
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227 | (1) |
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227 | (1) |
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Estimates for the frequency of the lowest vibration mode with the help of an elliptically symmetrical test function |
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228 | (2) |
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Estimates for the second vibration modes |
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230 | (1) |
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Estimates of eigenfrequencies for higher vibration modes |
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231 | (1) |
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232 | (1) |
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232 | (1) |
References |
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233 | (4) |
Index |
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237 | |