Partition Algebras

Details Partition Algebras Partition Algebras

2004-01-23

arxiv.org/abs/math/0401314v2

Mathematics

Representation Theory

Scientific paper

The partition algebras are algebras of diagrams (which contain the group algebra of the symmetric group and the Brauer algebra) such that the multiplication is given by a combinatorial rule and such that the structure constants of the algebra depend polynomially on a parameter. This is a survey paper which proves the primary results in the theory of partition algebras. Some of the results in this paper are new. This paper gives: (a) a presentation of the partition algebras by generators and relations, (b) shows that each partition algebra has an ideal which is isomorphic to a basic construction and such that the quotient is isomorphic to the group algebra of the symmetric gropup, (c) shows that partition algebras are in "Schur-Weyl duality" with the symmetric groups on tensor space, (d) provides a construction of "Specht modules" for the partition algebras (integral lattices in the generic irreducible modules), (e) determines (with a couple of exceptions) the values of the parameter where the partition algebras are semisimple, (f) provides "Murphy elements" for the partition algebras that play exactly analogous roles to the classical Murphy elements for the group algebra of the symmetric group. The primary new results in this paper are (a) and (f).

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