In 2005 Anton Cox and I wrote a general article which surveyed (and in
some cases mildly generalised) many of the more recent results on homomorphisms and the higher Ext groups for q-Schur algebras and for the Hecke algebra of type A.
In this talk I will update this survey and give an overview of various results giving isomorphisms between Ext groups in the two categories, and discuss those cases where explicit values for these Ext groups have been determined.

Lecture #12721

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