Riordan, John Combinatorial identities. (English) Zbl 0194.00502 New York- London-Sydney: John Wiley and Sons, Inc. 1968. XII, 256 p. (1968). Page: −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 9 ReviewsCited in 610 Documents MathOverflow Questions: Finding f such that f(f(x))=g(x) given g Keywords:combinatorics PDF BibTeX XML OpenURL