By J. H. van Lint, R. M. Wilson

This significant textbook, a manufactured from decades' educating, will entice all academics of combinatorics who enjoy the breadth and intensity of the topic. The authors take advantage of the truth that combinatorics calls for relatively little technical historical past to supply not just a typical advent but additionally a view of a few modern difficulties. the entire 36 chapters are in bite-size parts; they conceal a given subject in average intensity and are supplemented by means of routines, a few with recommendations, and references. to prevent an advert hoc visual appeal, the authors have focused on the relevant topics of designs, graphs and codes.

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**Extra resources for A course in combinatorics**

**Example text**

Compressed equality checking can be solved in polynomial time. In Sect. 3 we give an outline of the currently fastest (and probably also simplest) algorithm for compressed equality checking, which is due to Je˙z [17]. In Sect. 4, we sketch a new approach from [22] that yields a randomized parallel algorithm for compressed equality checking. 3 Sequential Algorithms The polynomial time compressed equality checking algorithms of Hirshfeld et al. [15, 16] and Plandowski [31] use combinatorial properties of strings, in particular the periodicity lemma of Fine and Wilf [9].

Theor. Comput. Sci. 464, 48–71 (2012) 6. : Streams are forever. Bull. EATCS 109, 70–106 (2013) 7. : Invitation to mathematics. Princeton University Press (1992) 8. : The upper semi-lattice of degrees of recursive unsolvability. Ann. Math. 59(3), 379–407 (1954) 9. : Classical Recursion Theory. Studies in logic and the foundations of mathematics. North-Holland, Amsterdam (1999) 10. : Degrees of finite-state transformability. Inf. Control 24(2), 144–154 (1974) 11. : Elements of Automata Theory. Cambridge (2003) 12.

Two words u, v are k-abelian equivalents if every word of length at most k occurs as a factor in u as many times as in v. A word is strongly k-abelian nthpower if it is k-abelian equivalent to a nth-power. In WORDS 2013, Mari Huova and Aleksi Saarela prove that strongly k-abelian nth-powers are unavoidable on any alphabet. - Pattern avoidance by palindromes was the subject of the talk from Inna A. Mikhailova and Mikhail Volkov, in WORDS 2007. e. φ2 = id, φ(uv) = φ(v)φ(u)) and the pseudopalindromic closure of a word w is the shortest pseudopalindrome having w as a preﬁx.