Affine Frobenius Brauer Categories

Abstract: We define the affine Frobenius Brauer category $\mathcal{AB}(A, -^\star)$ associated to each symmetric involutive Frobenius superalgebra $A$. We then define an action of these categories on the categories of finite-dimensional supermodules for orthosymplectic Lie superalgebras defined over $A$. The case where $A$ is the base field recovers the known action of the affine Brauer category on categories of supermodules for orthogonal and symplectic Lie algebras. The definition and associated action of $\mathcal{AB}(A, -^\star)$ are both novel when $A$ is e.g. the quaternions $\mathbb{H}$, a finite group algebra, a zigzag superalgebra, or a truncated polynomial algebra. Finally, we state a conjecture for bases of hom-spaces in $\mathcal{AB}(A, -^\star)$ and outline a potential proof strategy.