The quasi-heredity criterion for odd-rank algebras of type BB

Let nn and rr be positive integers, let qq be the parameter, let QQ be the second parameter, and let Ln(2r1)\mathcal{L}^n(2r-1) denote the algebra under consideration. Quasi-heredity conjecture. The algebra Ln(2r1)\mathcal{L}^n(2r-1) is quasi-hereditary if and only if QqkQ\neq -q^k for all kk satisfying

4n2k<min(n,r).\frac{4-n}{2}\leq k<\min(n,r).

This is proposed as a natural extension of the preceding results to smaller values of mm. The surrounding discussion notes that quasi-heredity can occur for m<2n+1m<2n+1 even when the earlier condition holds, while the criterion is presented as a guess and no resolution is supplied here.

Sources & referencesView supporting material

Primary source

Dinushi Munasinghe and Ben Webster, “On the representation theory of Schur algebras in type B”, arXiv:2307.10406 (2023).

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