Stanley symmetric function

http://dbpedia.org/resource/Stanley_symmetric_function an entity of type: Abstraction100002137

In mathematics and especially in algebraic combinatorics, the Stanley symmetric functions are a family of symmetric functions introduced by Richard Stanley in his study of the symmetric group of permutations. reduced decompositions. (Here denotes the binomial coefficient n(n − 1)/2 and ! denotes the factorial.) rdf:langString
rdf:langString Stanley symmetric function
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rdf:langString Richard P. Stanley
rdf:langString Richard
rdf:langString Stanley
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rdf:langString In mathematics and especially in algebraic combinatorics, the Stanley symmetric functions are a family of symmetric functions introduced by Richard Stanley in his study of the symmetric group of permutations. Formally, the Stanley symmetric function Fw(x1, x2, ...) indexed by a permutation w is defined as a sum of certain fundamental quasisymmetric functions. Each summand corresponds to a reduced decomposition of w, that is, to a way of writing w as a product of a minimal possible number of adjacent transpositions. They were introduced in the course of Stanley's enumeration of the reduced decompositions of permutations, and in particular his proof that the permutation w0 = n(n − 1)...21 (written here in one-line notation) has exactly reduced decompositions. (Here denotes the binomial coefficient n(n − 1)/2 and ! denotes the factorial.)
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