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May
4
awarded  Popular Question
Apr
27
awarded  Nice Question
Apr
21
accepted Weights in $\mathfrak{sl}(3,\mathbb{C})$
Apr
19
comment Weights in $\mathfrak{sl}(3,\mathbb{C})$
Isn't the killing form $(A,B) \mapsto tr(ad(A) ad(B))$?
Apr
19
asked Weights in $\mathfrak{sl}(3,\mathbb{C})$
Apr
19
awarded  Popular Question
Mar
26
answered The only dense linear subspace of $\mathbb{C}^n$.
Mar
20
accepted Closedness of set in product topology
Mar
20
asked Closedness of set in product topology
Mar
15
accepted support of function in topological group
Mar
13
asked support of function in topological group
Feb
21
accepted Representations of the Lie algebra $\mathfrak{sl}(2,\mathbb{C})$
Feb
21
comment Representations of the Lie algebra $\mathfrak{sl}(2,\mathbb{C})$
I don't see why. If $V_\lambda=0$, then keeping it in the sum or not has no effect. How does one get an invariant subspace if the string is broken? I'm not saying you're lying, I'm just confused.
Feb
21
asked Representations of the Lie algebra $\mathfrak{sl}(2,\mathbb{C})$
Feb
6
accepted Weyl algebra confusion
Feb
6
comment Weyl algebra confusion
Perfect. Thanks. I was being obtuse.
Feb
5
revised Weyl algebra confusion
added 2 characters in body
Feb
5
asked Weyl algebra confusion
Feb
5
asked centre of universal enveloping algebra for specific algebras
Jan
24
comment Modified first isomorphism theorem
Perfect! Thank you very much.