Reputation
5,564
Next privilege 10,000 Rep.
Access moderator tools
Badges
1 19 34
Newest
 Yearling
Impact
~54k people reached

12h
revised A finiteness property for semi-simple algebraic groups
deleted 1 character in body
14h
awarded  Yearling
Apr
20
comment If two Hecke characters cut out the same field, are they Galois conjugates?
what sort of characters do you have in mind? What is the topology on ${\overline {\mathbb Q}}^*$? Is it discrete? With respect to this topology, do you want the characters to be continuous?
Apr
20
comment multiplicity-free action on $SO(n+1)/SO(n-1)$
Welcome to MO, Friedrich!
Apr
20
revised Two similar integrals
deleted 21 characters in body
Apr
20
reviewed Approve topological-dynamics tag wiki excerpt
Apr
20
reviewed Approve specific-calculation tag wiki
Apr
20
reviewed Approve connections tag wiki
Apr
20
reviewed Approve connections tag wiki excerpt
Apr
20
reviewed Approve chevalley-groups tag wiki excerpt
Apr
12
comment Philosophy behind cohomological representations
There is an article by Clozel in the Ann arbor conference on automorphic forms (editors: Milne and Clozel) where he talks about automorphic representations which at infinity have algebraic Langlands parameter; these are the ones where the infinity component is "cohomological" (apart from "Artin representations"). That article contains much information on why these are important.
Apr
9
comment Some question on haar measure for sumsets of closed subsets of profinite groups
what is the question? Do you wish to know if $\mu _H(A_1A_2)>0$? In that case please edit the question. This question is indeed answered below
Apr
9
comment Philosophy behind cohomological representations
Surely your advisor Raghuram will be the right person to tell you?
Mar
25
reviewed Approve nt.number-theory tag wiki excerpt
Mar
25
reviewed Approve nt.number-theory tag wiki
Mar
22
comment A question about homogenous polynomials of degree $\frac{n(n-1)}{2}$
Well, $x_2^{n-1} x_1^{n-2}x_3^{n-3}\cdots x_{n-1}$ also contributes
Mar
22
revised A question about homogenous polynomials of degree $\frac{n(n-1)}{2}$
deleted 4 characters in body
Mar
13
comment Technical issue in the approach to Lie groups taken in a book
An analytic subgroup of $U(N)$ whose Lie algebra is a simple Lie algebra is necessarily closed (and follows, as some of the answers have observed) from the fact that all derivations of the Lie algebra are inner. Further, if you have a simple Lie algebra consisting of skew symmetric matrices, then its complexification is simple.
Mar
13
comment For an arithmetic hyperbolic 3-manifold group, when is its trace field not its invariant trace field?
If $\Gamma \subset SL_2({\mathbb C})$ is a Kleinian subgroup, will you please define what the trace field and the invariant trace fields are? One can then think about your question (since I have not seen Maclachlan Reid) .
Mar
13
revised Technical issue in the approach to Lie groups taken in a book
added 70 characters in body