M T's user avatar
M T's user avatar
M T's user avatar
M T
  • Member for 13 years, 10 months
  • Last seen more than a month ago
444 votes

Awfully sophisticated proof for simple facts

36 votes

Is there a version of inclusion/exclusion for vector spaces?

27 votes

Commutator subgroup does not consist only of commutators?

11 votes

Mathematics and cancer research

11 votes
Accepted

Is the universal enveloping algebra of a finite-dimensional Lie algebra (left) noetherian?

11 votes

What is the categorical significance of the trivial $\mathfrak{g}$-module in the category of $\mathfrak{g}$-mod?

9 votes

"Lie algebra" for a general group ?

9 votes

nonstandard analysis book recommendation

8 votes
Accepted

Is there a notation for the symmetric / antisymmetric subspaces of a tensor power that distinguishes them from the symmetric / exterior power?

8 votes

How to recognize a Hopf algebra?

7 votes

What is the cubic Casimir element of $\mathfrak{sl}_3$?

7 votes

When k[G/H] is multiplicity free G module ?

6 votes

Subgroups of p-groups

5 votes

solvability of an elementary functional equation

5 votes

Simple modules for $U_q(\mathfrak{sl}_n)$ at roots of unity

5 votes
Accepted

Nilpotency degree of the augmentation ideal

5 votes

How to find a nontrivial system of anticommuting matrices ?

4 votes

What do we know about periodic modules in p-groups?

4 votes
Accepted

How to compute this $\mathrm{Ext}^1$?

4 votes

Covering derivations of a quotient algebra

3 votes

Approachable French masters

2 votes
Accepted

Extensions which define the same element of $\text{Ext}^n(M,N)$ are in fact equivalent

2 votes

Suggestions for teaching advanced high school students

2 votes

Finite groups of the form p^3q

2 votes

How to prove H^2(g,J(g)) is nonzero for a semisimple Lie algebra g, where J(g) is the augmentation ideal of g?

2 votes

papers archives? (especially not indexed by google)

1 vote

Computing Slim Extensions representing Ext

1 vote

Compatibility of connecting homomorphisms for Tor/Ext

0 votes

Certain notations in Cayley's work

0 votes

Deformations of semisimple Lie algebras