Abstract
We give a family of pairs of Weyl modules for the q-Schur algebras for which the corresponding homomorphism space is at least 2-dimensional. Using this result we show that for any field F and any q∈F× such that 1+q+⋯+qf−1=0 for some integer 2≤f<∞ there exist arbitrarily large homomorphism spaces between pairs of Weyl modules.
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