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E-grāmata: Algorithmic Aspects of Machine Learning

(Massachusetts Institute of Technology)
  • Formāts: PDF+DRM
  • Izdošanas datums: 27-Sep-2018
  • Izdevniecība: Cambridge University Press
  • Valoda: eng
  • ISBN-13: 9781316886854
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  • Formāts: PDF+DRM
  • Izdošanas datums: 27-Sep-2018
  • Izdevniecība: Cambridge University Press
  • Valoda: eng
  • ISBN-13: 9781316886854

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Machine learning is reshaping our everyday life. This book explores the theoretical underpinnings in an accessible way, offering theoretical computer scientists an introduction to important models and problems and offering machine learning researchers a cutting-edge algorithmic toolkit.

This book bridges theoretical computer science and machine learning by exploring what the two sides can teach each other. It emphasizes the need for flexible, tractable models that better capture not what makes machine learning hard, but what makes it easy. Theoretical computer scientists will be introduced to important models in machine learning and to the main questions within the field. Machine learning researchers will be introduced to cutting-edge research in an accessible format, and gain familiarity with a modern, algorithmic toolkit, including the method of moments, tensor decompositions and convex programming relaxations. The treatment beyond worst-case analysis is to build a rigorous understanding about the approaches used in practice and to facilitate the discovery of exciting, new ways to solve important long-standing problems.

Recenzijas

'The unreasonable effectiveness of modern machine learning has thrown the gauntlet down to theoretical computer science. Why do heuristic algorithms so often solve problems that are intractable in the worst case? Is there predictable structure in the problem instances that arise in practice? Can we design novel algorithms that exploit such structure? This book is an introduction to the state-of-the-art at the interface of machine learning and theoretical computer science, lucidly written by a leading expert in the area.' Tim Roughgarden, Stanford University, California 'This book is a gem. It is a series of well-chosen and organized chapters, each centered on one algorithmic problem arising in machine learning applications. In each, the reader is lead through different ways of thinking about these problems, modeling them, and applying different algorithmic techniques to solving them. In this process, the reader learns new mathematical techniques from algebra, probability, geometry and analysis that underlie the algorithms and their complexity. All this material is delivered in a clear and intuitive fashion.' Avi Wigderson, Institute for Advanced Study, New Jersey 'A very readable introduction to a well-curated set of topics and algorithms. It will be an excellent resource for students and researchers interested in theoretical machine learning and applied mathematics.' Sanjeev Arora, Princeton University, New Jersey 'This text gives a clear exposition of important algorithmic problems in unsupervised machine learning including nonnegative matrix factorization, topic modeling, tensor decomposition, matrix completion, compressed sensing, and mixture model learning. It describes the challenges that these problems present, gives provable guarantees known for solving them, and explains important algorithmic techniques used. This is an invaluable resource for instructors and students, as well as all those interested in understanding and advancing research in this area.' Avrim Blum, Toyota Technical Institute at Chicago 'Moitra has written a high-level, fast-paced book on connections between theoretical computer science and machine learning. A main theme throughout the book is to go beyond worst-case analysis of algorithms. This is done in three ways: by probabilistic algorithms, by algorithms that are very efficient on simple inputs, and by notions of stability that emphasize instances of problems that have meaningful answers and thus are particularly important to solve. Summing Up: Highly recommended.' M. Bona, Choice ' the challenges to prove simple but unproven claims and delving deeper into the topics makes it a fascinating read one of the best parts of the book is the introduction to each chapter. They thoroughly motivate the topic of the chapters.' Sarvagya Upadhyay, SIGACT News 'The chapters are written in an understandable way, the mathematical fundamentals are elaborated and explained well.' Helena Mihaljevi, zbMATH

Papildus informācija

Introduces cutting-edge research on machine learning theory and practice, providing an accessible, modern algorithmic toolkit.
Preface vii
1 Introduction
1(3)
2 Nonnegative Matrix Factorization
4(25)
2.1 Introduction
4(7)
2.2 Algebraic Algorithms
11(5)
2.3 Stability and Separability
16(6)
2.4 Topic Models
22(5)
2.5 Exercises
27(2)
3 Tensor Decompositions: Algorithms
29(19)
3.1 The Rotation Problem
29(2)
3.2 A Primer on Tensors
31(4)
3.3 Jennrich's Algorithm
35(5)
3.4 Perturbation Bounds
40(6)
3.5 Exercises
46(2)
4 Tensor Decompositions: Applications
48(23)
4.1 Phylogenetic Trees and HMMs
48(7)
4.2 Community Detection
55(3)
4.3 Extensions to Mixed Models
58(7)
4.4 Independent Component Analysis
65(4)
4.5 Exercises
69(2)
5 Sparse Recovery
71(18)
5.1 Introduction
71(3)
5.2 Incoherence and Uncertainty Principles
74(3)
5.3 Pursuit Algorithms
77(3)
5.4 Prony's Method
80(3)
5.5 Compressed Sensing
83(5)
5.6 Exercises
88(1)
6 Sparse Coding
89(18)
6.1 Introduction
89(3)
6.2 The Undercomplete Case
92(4)
6.3 Gradient Descent
96(5)
6.4 The Overcomplete Case
101(5)
6.5 Exercises
106(1)
7 Gaussian Mixture Models
107(25)
7.1 Introduction
107(4)
7.2 Clustering-Based Algorithms
111(4)
7.3 Discussion of Density Estimation
115(3)
7.4 Clustering-Free Algorithms
118(5)
7.5 A Univariate Algorithm
123(4)
7.6 A View from Algebraic Geometry
127(4)
7.7 Exercises
131(1)
8 Matrix Completion
132(11)
8.1 Introduction
132(3)
8.2 Nuclear Norm
135(4)
8.3 Quantum Golfing
139(4)
Bibliography 143(7)
Index 150
Ankur Moitra is the Rockwell International Associate Professor of Mathematics at Massachusetts Institute of Technology. He is a principal investigator in the Computer Science and Artificial Intelligence Lab (CSAIL), a core member of the Theory of Computation Group, Machine Learning@MIT, and the Center for Statistics. The aim of his work is to bridge the gap between theoretical computer science and machine learning by developing algorithms with provable guarantees and foundations for reasoning about their behavior. He is a recipient of a Packard Fellowship, a Sloan Fellowship, an National Science Foundation (NSF) CAREER Award, an NSF Computing and Innovation Fellowship and a Hertz Fellowship.