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Integer Flows and Cycle Covers of Graphs

Author: Cun-Quan Zhang

Publisher: CRC Press

Published: 1997-01-02

Total Pages: 402

ISBN-13: 9780824797904

Focuses on classical problems in graph theory, including the 5-flow conjectures, the edge-3-colouring conjecture, the 3-flow conjecture and the cycle double cover conjecture. The text highlights the interrelationships between graph colouring, integer flow, cycle covers and graph minors. It also concentrates on graph theoretical methods and results.

Minimum Cycle Covering and Integer Flows

Author:

Publisher:

Published: 1989

Total Pages: 14

ISBN-13:

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It was conjectured by Fan that if a graph G = (V, E) has a nowhere- zero 3-flow, then G can be covered by two even subgraphs of total size at most / V/ + /E/ -3. This conjecture is proved in this paper. It is also proved in this paper that the optimum solution of the Chinese Postman problem and the solution of minimum cycle covering problem are equivalent for any graph admitting a nowhere-zero 4-flow.

Circuit Double Cover of Graphs

Author: Cun-Quan Zhang

Publisher: Cambridge University Press

Published: 2012-04-26

Total Pages: 380

ISBN-13: 1107268249

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The famous Circuit Double Cover conjecture (and its numerous variants) is considered one of the major open problems in graph theory owing to its close relationship with topological graph theory, integer flow theory, graph coloring and the structure of snarks. It is easy to state: every 2-connected graph has a family of circuits covering every edge precisely twice. C.-Q. Zhang provides an up-to-date overview of the subject containing all of the techniques, methods and results developed to help solve the conjecture since the first publication of the subject in the 1940s. It is a useful survey for researchers already working on the problem and a fitting introduction for those just entering the field. The end-of-chapter exercises have been designed to challenge readers at every level and hints are provided in an appendix.

Quo Vadis, Graph Theory?

Author: J. Gimbel

Publisher: Elsevier

Published: 1993-03-17

Total Pages: 407

ISBN-13: 0080867952

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Graph Theory (as a recognized discipline) is a relative newcomer to Mathematics. The first formal paper is found in the work of Leonhard Euler in 1736. In recent years the subject has grown so rapidly that in today's literature, graph theory papers abound with new mathematical developments and significant applications. As with any academic field, it is good to step back occasionally and ask Where is all this activity taking us?, What are the outstanding fundamental problems?, What are the next important steps to take?. In short, Quo Vadis, Graph Theory?. The contributors to this volume have together provided a comprehensive reference source for future directions and open questions in the field.

Combinatorial Optimization

Author: Alexander Schrijver

Publisher: Springer Science & Business Media

Published: 2003-02-12

Total Pages: 2024

ISBN-13: 9783540443896

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From the reviews: "About 30 years ago, when I was a student, the first book on combinatorial optimization came out referred to as "the Lawler" simply. I think that now, with this volume Springer has landed a coup: "The Schrijver". The box is offered for less than 90.- EURO, which to my opinion is one of the best deals after the introduction of this currency." OR-Spectrum

Graph Structure Theory

Author: Neil Robertson

Publisher: American Mathematical Soc.

Published: 1993-06-14

Total Pages: 706

ISBN-13: 0821851608

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This volume contains the proceedings of the AMS-IMS-SIAM Joint Summer Research Conference on Graph Minors, held at the University of Washington in Seattle in the summer of 1991. Among the topics covered are: algorithms on tree-structured graphs, well-quasi-ordering, logic, infinite graphs, disjoint path problems, surface embeddings, knot theory, graph polynomials, matroid theory, and combinatorial optimization.

Topics in Chromatic Graph Theory

Author: Lowell W. Beineke

Publisher: Cambridge University Press

Published: 2015-05-07

Total Pages: 416

ISBN-13: 1316239853

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Chromatic graph theory is a thriving area that uses various ideas of 'colouring' (of vertices, edges, and so on) to explore aspects of graph theory. It has links with other areas of mathematics, including topology, algebra and geometry, and is increasingly used in such areas as computer networks, where colouring algorithms form an important feature. While other books cover portions of the material, no other title has such a wide scope as this one, in which acknowledged international experts in the field provide a broad survey of the subject. All fifteen chapters have been carefully edited, with uniform notation and terminology applied throughout. Bjarne Toft (Odense, Denmark), widely recognized for his substantial contributions to the area, acted as academic consultant. The book serves as a valuable reference for researchers and graduate students in graph theory and combinatorics and as a useful introduction to the topic for mathematicians in related fields.

Cycle Covers of Graphs with a Nowhere-zero 4-flow

Author: André Raspaud

Publisher:

Published: 1989

Total Pages: 10

ISBN-13:

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Combinatorics And Graph Theory '95 - Proceedings Of The Summer School And International Conference On Combinatorics

Author: Ku Tung-hsin

Publisher: World Scientific

Published: 1995-05-31

Total Pages: 528

ISBN-13: 9814548960

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This book in its Second Edition is a useful, attractive introduction to basic counting techniques for upper secondary to undergraduate students, as well as teachers. Younger students and lay people who appreciate mathematics, not to mention avid puzzle solvers, will also find the book interesting. The various problems and applications here are good for building up proficiency in counting. They are also useful for honing basic skills and techniques in general problem solving. Many of the problems avoid routine and the diligent reader will often discover more than one way of solving a particular problem, which is indeed an important awareness in problem solving. The book thus helps to give students an early start to learning problem-solving heuristics and thinking skills.New chapters originally from a supplementary book have been added in this edition to substantially increase the coverage of counting techniques. The new chapters include the Principle of Inclusion and Exclusion, the Pigeonhole Principle, Recurrence Relations, the Stirling Numbers and the Catalan Numbers. A number of new problems have also been added to this edition.

STACS 2005

Author: Volker Diekert

Publisher: Springer Science & Business Media

Published: 2005-02-16

Total Pages: 722

ISBN-13: 3540249982

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This book constitutes the refereed proceedings of the 22nd Annual Symposium on Theoretical Aspects of Computer Science, STACS 2005, held in Stuttgart, Germany in February 2005. The 54 revised full papers presented together with 3 invited papers were carefully reviewed and selected from 217 submissions. A broad variety of topics from theoretical computer science are addressed, in particular complexity theory, algorithmics, computational discrete mathematics, automata theory, combinatorial optimization and approximation, networking and graph theory, computational geometry, grammar systems and formal languages, etc.