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math.CO2025
Catalan numbers and a conjecture on the maximum composition length of a Kac module
Ian M. Musson
Let be a function such that for all except finitely for many . We define a set of non-int…
math.AG2025
Categorical quotients for actions of groupoids on varieties
Ian M. Musson
For certain actions of the Weyl groupoid from [Sergeev and Veselov, Grothendieck rings of basic classical Lie superalgebras, Ann Math, 2011] on an affine variety …