Catalan Numbers with Applications

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Oxford University Press, USA, 2009 - 422 pàgines
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Like the intriguing Fibonacci and Lucas numbers, Catalan numbers are also ubiquitous. "They have the same delightful propensity for popping up unexpectedly, particularly in combinatorial problems," Martin Gardner wrote in Scientific American. "Indeed, the Catalan sequence is probably the most frequently encountered sequence that is still obscure enough to cause mathematicians lacking access to Sloane's Handbook of Integer Sequences to expend inordinate amounts of energy re-discovering formulas that were worked out long ago," he continued. As Gardner noted, many mathematicians may know the abc's of Catalan sequence, but not many are familiar with the myriad of their unexpected occurrences, applications, and properties; they crop up in chess boards, computer programming, and even train tracks. This book presents a clear and comprehensive introduction to one of the truly fascinating topics in mathematics. Catalan numbers are named after the Belgian mathematician Eugene Charles Catalan (1814-1894), who "discovered" them in 1838, though he was not the first person to discover them. The great Swiss mathematician Leonhard Euler (1707-1763) "discovered" them around 1756, but even before then and though his work was not known to the outside world, Chinese mathematician Antu Ming (1692?-1763) first discovered Catalan numbers about 1730. A great source of fun for both amateurs and mathematicians, they can be used by teachers and professors to generate excitement among students for exploration and intellectual curiosity and to sharpen a variety of mathematical skills and tools, such as pattern recognition, conjecturing, proof-techniques, and problem-solving techniques. This book is not intended for mathematicians only but for a much larger audience, including high school students, math and science teachers, computer scientists, and those amateurs with a modicum of mathematical curiosity. An invaluable resource book, it contains an intriguing array of applications to computer science, abstract algebra, combinatorics, geometry, graph theory, chess, and world series.
 

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Continguts

1 Binomial Coefficients
1
2 The Central Binomial Coefficient
13
3 The Central Binomial Coefficient Revisited
51
4 Binomial Coefficients Revisited
89
5 Catalan Numbers
103
6 The Ubiquity of Catalan Numbers I
149
7 The Ubiquity of Catalan Numbers II
191
8 Trees and Catalan Numbers
227
13 Divisibility Properties
329
14 A Catalan Triangle
333
15 A Family of Binary Words
347
16 Tribinomial Coefficients
357
17 Generalized Catalan Numbers
375
Appendix A
379
The First 100 Catalan Numbers
391
References
395

9 Lattice Paths and Catalan Numbers
259
10 Partitions and Catalan Numbers
281
11 Algebra Sports and Catalan Numbers
289
12 Pascals Triangle and Catalan Numbers
313

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Thomas Koshy, Ph.D., is Professor of Mathematics at Framingham State College, Framingham, Massachusetts. His Fibonacci and Lucas Numbers with Applications, published by Wiley, won the Association of American Publishers' new book award in 2001.

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