| Document Type
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BL
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| Record Number
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656501
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| Doc. No
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dltt
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| Title & Author
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Covering codes /\ Gérard Cohen [and others]
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| Publication Statement
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Amsterdam ;New York :: Elsevier,, 1997
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| Series Statement
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North-Holland mathematical library ;; v. 54
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| Page. NO
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xxi, 542 pages :: illustrations ;; 23 cm
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| ISBN
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0444825118
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: 9780444825117
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| Bibliographies/Indexes
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Includes bibliographical references (pages 495-536) and index
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| Contents
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Cover -- Contents -- Preface -- List of Symbols -- List of Tables -- Chapter 1. Introduction -- 1.1 Covering problems -- 1.2 Applications -- Chapter 2. Basic facts -- 2.1 Codes -- 2.2 The MacWilliams identities -- 2.3 Krawtchouk polynomials -- 2.4 Hamming spheres -- 2.5 Finite fields -- 2.6 Families of error-correcting codes -- 2.7 Designs, constant weight codes, graphs -- 2.8 Notes -- Chapter 3. Constructions -- 3.1 Puncturing and adding a parity check bit -- 3.2 Direct sum -- 3.3 Piecewise constant codes -- 3.4 Variations on the (u, u + v) construction -- 3.5 Matrix construction -- 3.6 Cascading -- 3.7 Optimal short nonbinary codes -- 3.8 Simulated annealing and local search -- 3.9 Notes -- Chapter 4. Normality -- 4.1 Amalgamated direct sum -- 4.2 Normality of binary linear codes -- 4.3 Abnormal binary nonlinear codes -- 4.4 Normality of binary nonlinear codes -- 4.5 Blockwise direct sum -- 4.6 Notes -- Chapter 5. Linear constructions -- 5.1 Basic facts about linear covering codes -- 5.2 The case R = 1; examples of small codes -- 5.3 Saving more than one coordinate -- 5.4 Davydov's basic construction -- 5.5 Notes -- Chapter 6. Lower bounds -- 6.1 Bounds for the cardinality of the union of K spheres -- 6.2 Balanced codes -- 6.3 Excess bounds for codes with covering radius one -- 6.4 Excess bounds for codes with arbitrary covering radius -- 6.5 The method of linear inequalities -- 6.6 Table on K (n, R) -- 6.7 Lower bounds for nonbinary codes -- 6.8 Notes -- Chapter 7. Lower bounds for linear codes -- 7.1 Excess bounds for linear codes -- 7.2 Linear codes with covering radius two and three -- 7.3 Tables for linear codes -- 7.4 Notes -- Chapter 8. Upper bounds -- 8.1 Codes with given size and distance -- 8.2 Covering radii of subcodes -- 8.3 Covering radius and dual distance -- 8.4 Notes -- Chapter 9. Reed-Muller codes -- 9.1 Definitions and properties -- 9.2 First order Reed-Muller codes -- 9.3 Reed-Muller codes of order 2 and m -- 3 -- 9.4 Covering radius of Reed-Muller codes of arbitrary order -- 9.5 Notes -- Chapter 10. Algebraic codes -- 10.1 BCH codes: definitions and properties -- 10.2 2-and 3-error-correcting BCH codes -- 10.3 Long BCH codes -- 10.4 Normality of BCH codes -- 10.5 Other algebraic codes -- 10.6 Notes -- Chapter 11. Perfect codes -- 11.1 Perfect linear codes over IFq -- 11.2 A nonexistence result -- 11.3 Enumeration of perfect binary codes -- 11.4 Enumeration of perfect codes over Fq -- 11.5 Mixed codes -- 11.6 Generalizations of perfect codes -- 11.7 Notes -- Chapter 12. Asymptotic bounds -- 12.1 Covering radius of unrestricted codes -- 12.2 Greedy algorithm and good coverings -- 12.3 Covering radius of hnear codes -- 12.4 Density of coverings -- 12.5 Coverings of small size -- 12.6 Bounds on the minimum distance -- T$
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| Abstract
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The problems of constructing covering codes and of estimating their parameters are the main concern of this book. It provides a unified account of the most recent theory of covering codes and shows how a number of mathematical and engineering issues are related to covering problems. Scientists involved in discrete mathematics, combinatorics, computer science, information theory, geometry, algebra or number theory will find the book of particular significance. It is designed both as an introductory textbook for the beginner and as a reference book for the expert mathematician and engineer. A number of unsolved problems suitable for research projects are also discussed
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| Subject
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Combinatorial packing and covering
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enveloppe convexe
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code
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géométrie algorithmique
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| Subject
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recouvrement
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espace euclidien
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| Dewey Classification
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003/.54
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| LC Classification
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QA166.7.C68 1997
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| Added Entry
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Cohen, G., (Gérard),1951-
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