Tampilkan postingan dengan label Combinatorial. Tampilkan semua postingan
Tampilkan postingan dengan label Combinatorial. Tampilkan semua postingan

Kamis, 17 Mei 2012

Combinatorial Optimization (3 volume, A,B, & C)

Ebook Download | Combinatorial Optimization (3 volume, A,B, & C) | A definitive account of the history and present state of combinatorial optimization from an author who is one of the most respected researchers in this area. The author has won the Dantzig award, the Fulkerson prize (twice) and the Lanchester Prize for his earlier classic text on "Theory of Linear and Integer Programming". Given the current pricing, it is a steal with over 1800 pages spread across three volumes. This is certainly not a text to be read from cover to cover but is a handy reference if you are interested in combinatorial optimization as a research topic or in the related areas of optimization, integer programming, polyhedral combinatorics, or graph theory. The author gives short and elegants proof of most of the results. The reader is expected to have a background in graph theory, linear programming and integer programming. The author cites some results without proofs from his earlier books , "Theory of Linear and Integer Programming", and "Geometric Algorithms and Combinatorial Optimization". The book does not concentrate on applications and modeling aspects of combinatorial optimization problems and it does not dwell on the computational methods for NP-hard problems. The book does not offer exercises but lists some open problems and research topics (updated on author's website).

The book is mainly devoted to the theoretical developments in this field. Quoting the author, "We aim at offering an introduction and an in-depth survey of polyhedral combinatorics and efficient algorithms ... In the astonishing event that NP=P will be proved, this book will be highly incomplete". The results in this book are up to date till 2002 (updates are available at the author's website). In short this book should be invaluable for a graduate student or a researcher.






Sabtu, 24 Maret 2012

The Art of Computer Programming, Volume 4A: Combinatorial Algorithms,Part 1

Ebook Download | The Art of Computer Programming, Volume 4A: Combinatorial Algorithms, Part 1 | Knuth has written many books considered classics. Some of the previous works have been set-up for where the real fun is - Combinatorics. In one of my own columns, I say "Never trust the brute-force power of a computer network to do the job of a combinatorialist." In 1967, John P. Robinson and Arthur J. Bernstein published an optimal Golomb ruler with 24 marks (OGR24). Their solution was confirmed in 2004 by a massive distributed effort using tens of thousand of computer years.
Knuth is attempting to discuss all the algorithms that will still be important 50 years from now. The amount of speed given using these algorithms is staggering. Some examples topics in the book:
Page 222 - Algorithm S: Breadth-first synthesis of BDDs
Page 293 - Balanced and Complementary Gray codes.
Page 424 - Stirling numbers and set partitions.
Page 449 - Generating binary trees

Helpful mathematical illustrations feature prominently throughout the book, and pretty much every page is gorgeously formatted. Knuth developed TeX in part to produce beautiful books, and that is on display here. Many thoughtful questions are provided as an aid to learning these very useful techniques. The Answers section runs for 303 pages. It will take me months or years to digest most the information in this work, but I can't imagine a better presentation for this difficult but lucratively useful material.