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Joppy
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12 votes
1 answer
761 views

The characteristic of the field does not divide the dimension of an irreducible representation

10 votes
1 answer
262 views

Kac-Moody algebras/groups for reductive groups

10 votes
2 answers
1k views

The Plucker relations are sufficient

8 votes
0 answers
911 views

Isomorphisms between invariants and coinvariants of characters

7 votes
0 answers
1k views

Deriving the projection onto the isotypic component

6 votes
1 answer
967 views

Irreducible weight modules for sl2 which are not highest or lowest-weight

5 votes
1 answer
245 views

Faithfullness of Weyl group action

5 votes
3 answers
537 views

Is the category of finite-dimensional $k[x]$-modules a comodule category?

5 votes
1 answer
763 views

Product of monoids

4 votes
0 answers
226 views

What is the subspace of alternating (not antisymmetric) tensors?

3 votes
1 answer
194 views

Showing equivalence between definitions of a quadratic form

2 votes
0 answers
33 views

Finding the closest point in a root lattice

2 votes
0 answers
49 views

Generating function for cardinality of Bruhat intervals

2 votes
0 answers
189 views

What are "hermitian matrices" and "unitary matrices" called in the context of quaternions?

2 votes
1 answer
201 views

Normal forms for matrices over division rings

2 votes
1 answer
260 views

Pivotal structure on representations of a Hopf algebra

2 votes
2 answers
234 views

Describing homs and tensors of the square-root sheaf

2 votes
1 answer
54 views

Is an "infinite upper unitriangular" matrix always invertible?

1 vote
1 answer
118 views

How should I think about this subset of a product of projective lines?

1 vote
0 answers
49 views

Binomial basis of polynomial ring [duplicate]

1 vote
0 answers
54 views

Terminology: "Modelling" a category via a faithful embedding

1 vote
0 answers
64 views

Reflection subgroups in Coxeter groups