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The Traveling Salesman Problem:
A Computational Study
David L. Applegate, Robert E. Bixby, Vasek Chvátal & William J. Cook

Book Description | Reviews
Chapter 1 [in PDF format]

TABLE OF CONTENTS:

Preface xi

Chapter 1: The Problem 1
1.1 Traveling Salesman 1
1.2 Other Travelers 5
1.3 Geometry 15
1.4 Human Solution of the TSP 31
1.5 Engine of Discovery 40
1.6 Is the TSP Hard? 44
1.7 Milestones in TSP Computation 50
1.8 Outline of the Book 56

Chapter 2: Applications 59
2.1 Logistics 59
2.2 Genome Sequencing 63
2.3 Scan Chains 67
2.4 Drilling Problems 69
2.5 Aiming Telescopes and X-Rays 75
2.6 Data Clustering 77
2.7 Various Applications 78

Chapter 3: Dantzig, Fulkerson, and Johnson 81
3.1 The 49-City Problem 81
3.2 The Cutting-Plane Method 89
3.3 Primal Approach 91

Chapter 4: History of TSP Computation 93
4.1 Branch-and-Bound Method 94
4.2 Dynamic Programming 101
4.3 Gomory Cuts 102
4.4 The Lin-Kernighan Heuristic 103
4.5 TSP Cuts 106
4.6 Branch-and-Cut Method 117
4.7 Notes 125

Chapter 5: LP Bounds and Cutting Planes 129
5.1 Graphs and Vectors 129
5.2 Linear Programming 131
5.3 Outline of the Cutting-Plane Method 137
5.4 Valid LP Bounds 139
5.5 Facet-Inducing Inequalities 142
5.6 The Template Paradigm for Finding Cuts 145
5.7 Branch-and-Cut Method 148
5.8 Hypergraph Inequalities 151
5.9 Safe Shrinking 153
5.10 Alternative Calls to Separation Routines 156

Chapter 6: Subtour Cuts and PQ-Trees 159
6.1 Parametric Connectivity 159
6.2 Shrinking Heuristic 164
6.3 Subtour Cuts from Tour Intervals 164
6.4 Padberg-Rinaldi Exact Separation Procedure 170
6.5 Storing Tight Sets in PQ-trees 173

Chapter 7: Cuts from Blossoms and Blocks 185
7.1 Fast Blossoms 185
7.2 Blocks of G1/2 187
7.3 Exact Separation of Blossoms 191
7.4 Shrinking 194

Chapter 8: Combs from Consecutive Ones 199
8.1 Implementation of Phase 2 202
8.2 Proof of the Consecutive Ones Theorem 210

Chapter 9: Combs from Dominoes 221
9.1 Pulling Teeth from PQ-trees 223
9.2 Nonrepresentable Solutions also Yield Cuts 229
9.3 Domino-Parity Inequalities 231

Chapter 10: Cut Metamorphoses 241
10.1 Tighten 243
10.2 Teething 248
10.3 Naddef-Thienel Separation Algorithms 256
10.4 Gluing 261

Chapter 11: Local Cuts 271
11.1 An Overview 271
11.2 Making Choices of V and σ 272
11.3 Revisionist Policies 274
11.4 Does φ(χ*) Lie Outside the Convex Hull of T ? 275
11.5 Separating φ(χ*) from T : The Three Phases 289
11.6 PHASE 1: From T* to T" 291
11.7 PHASE 2: From T" to T' 315
11.8 Implementing ORACLE 326
11.9 PHASE 3: From T' to T 329
11.10 Generalizations 339

Chapter 12: Managing the Linear Programming Problems 345
12.1 The Core LP 345
12.2 Cut Storage 354
12.3 Edge Pricing 362
12.4 The Mechanics 367

Chapter 13: The Linear Programming Solver 373
13.1 History 373
13.2 The Primal Simplex Algorithm 378
13.3 The Dual Simplex Algorithm 384
13.4 Computational Results: The LP Test Sets 390
13.5 Pricing 404

Chapter 14: Branching 411
14.1 Previous Work 411
14.2 Implementing Branch and Cut 413
14.3 Strong Branching 415
14.4 Tentative Branching 417

Chapter 15: Tour Finding 425
15.1 Lin-Kernighan 425
15.2 Flipper Routines 436
15.3 Engineering Lin-Kernighan 449
15.4 Chained Lin-Kernighan on TSPLIB Instances 458
15.5 Helsgaun's LKH Algorithm 466
15.6 Tour Merging 469

Chapter 16: Computation 489
16.1 The Concorde Code 489
16.2 Random Euclidean Instances 493
16.3 The TSPLIB 500
16.4 Very Large Instances 506
16.5 The World TSP 524

Chapter 17: The Road Goes On 531
17.1 Cutting Planes 531
17.2 Tour Heuristics 534
17.3 Decomposition Methods 539

Bibliography 541
Index 583

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File created: 10/23/2013

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