Mathematics – Representation Theory
Scientific paper
2011-07-05
Mathematics
Representation Theory
69 pages
Scientific paper
We introduce some graded versions of the walled Brauer algebra, working over a field of characteristic zero. This allows us to prove that the walled Brauer algebra is Morita equivalent to an idempotent truncation of a certain infinite dimensional version of Khovanov's arc algebra, as suggested by recent work of Cox and De Visscher. We deduce that the walled Brauer algebra is Koszul whenever its defining parameter is non-zero.
Brundan Jonathan
Stroppel Catharina
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