Abstract:We determine the decomposition numbers of the partition algebra when the characteristic of the ground field is zero or larger than the degree of the partition algebra. This will allow us to determine for which exact values of the parameter the partition algebras are semisimple over an arbitrary field. Furthermore, we show that the blocks of the partition algebra over an arbitrary field categorify weight spaces of an action of the quantum groups Uqp x slpq and Uqpsl8q on an analogue of the Fock space. In partic… Show more
“…When writing this paper, it was brought to the author's attention that the decomposition numbers of the partition algebra P k n (δ) for n < p were obtained independently, and by different methods, by A. Shalile [Sha14].…”
Abstract. We examine the structure of the partition algebra Pn(δ) over a field k of characteristic p > 0. In particular, we describe the decomposition matrix of Pn(δ) when n < p and δ = 0, and when n = p and δ = p − 1.
“…When writing this paper, it was brought to the author's attention that the decomposition numbers of the partition algebra P k n (δ) for n < p were obtained independently, and by different methods, by A. Shalile [Sha14].…”
Abstract. We examine the structure of the partition algebra Pn(δ) over a field k of characteristic p > 0. In particular, we describe the decomposition matrix of Pn(δ) when n < p and δ = 0, and when n = p and δ = p − 1.
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