bio | website | plusepsilon.de |
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location | Uni Hamburg | |
age | 29 | |
visits | member for | 4 years, 1 month |
seen | Sep 25 at 13:24 | |
stats | profile views | 8,334 |
Mar 22 |
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Local Langlands for $GL(2,\mathbf{C})$ and reducible principal series
I have chosen to delete my answer, because it seems not to address your question. As Marty points out $I(\chi_1,\chi_2)$ is isomorphic to $I(\chi_2,\chi_1)$ if both are irreducible. If they are reducible, they are not. What is an irreducible subquotient in one of them is an irreducible subrepresentation in the other. So that's why considering only unique subquotients hits all irr reps. |
Mar 22 |
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Local Langlands for $GL(2,\mathbf{C})$ and reducible principal series
The intertwiner seems wrong. You need $\int\limits_{U} f(wux) du$ for $w$ the Weyl element, or not? |
Mar 21 |
awarded | Custodian |
Mar 21 |
reviewed | Approve suggested edit on phase portrait of system of differential equations |
Mar 20 |
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The representation of a group
What kind of maps? Group homomorphisms, I guess? |
Mar 20 |
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reference help about a result on representation theory
Ah okay, I see imaginary line modulo $x=2 \pi i / log(q)$, $q$ being the residue characteristic, that's isomorphic to $U(1)$, I guess:) I didn't see that before:\ But that's a confusing embedding of $U(1)$ into $\mathbb{C}^\times$ modulo $x$. |
Mar 20 |
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reference help about a result on representation theory
@WillSawin My issue is that unitary one-dimensional representation live on the imaginary line, not $U(1)$. |
Mar 20 |
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Simultaneously extending the functionals of a subspace of a Banach space to the whole space
Be careful, there exists Banach spaces which do not admit a Schauder Basis. The first examples are due to Enflo. |
Mar 20 |
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Simultaneously extending the functionals of a subspace of a Banach space to the whole space
There are results available, when the extension is unique, e.g. in a Hilbert space or more general results can be found here jstor.org/discover/10.2307/…. Of course, Hamel basis are not to be chosen in topological vector space, e.g. for Banach spaces one works with a Schauder basis. |
Mar 20 |
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reference help about a result on representation theory
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Mar 20 |
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reference help about a result on representation theory
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Mar 20 |
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reference help about a result on representation theory
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Mar 20 |
answered | reference help about a result on representation theory |
Mar 16 |
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What can the theory of automorphic forms for $SL(n,\mathbb{Z})$ say about $SL(n,\mathbb{Z})$?
There is no Eichler-Selberg type trace formula for SL(3) because of the abscence of discrete series for SL(3,R). |
Mar 16 |
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What can the theory of automorphic forms for $SL(n,\mathbb{Z})$ say about $SL(n,\mathbb{Z})$?
there are certainly not easy ways to study this rep.theory... I meant to say easier ways in my last comment:\ |
Mar 16 |
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How can I find the spectrum of this operator?
Pls use one/two dollar signs for math |
Mar 16 |
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How can I find the spectrum of this operator?
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Mar 16 |
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What can the theory of automorphic forms for $SL(n,\mathbb{Z})$ say about $SL(n,\mathbb{Z})$?
I think your question has no obvious/easy answer because automorphic forms fix a specific discrete subgroup $\Gamma$ up front, so you can simply give get information for subgroups containing $\Gamma$, and $SL(n,Z)$ is known to be maximal. |
Mar 15 |
answered | Generic topology on a field |
Mar 10 |
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Adelization of modular forms: What measure on $L^2(G_\mathbb{Q}Z_{\mathbb{R}}\backslash G_{\mathbb{A}})$?
Okay, trivial is a strong word. Sorry, for that. I meant that it follows immediately from the definitions for weight zero plus a coordinate change. Compact subgroups are never an issue in harmonic analysis. The point of my answer was simply that the volume of the adelic quotient is usually considered as a rational number and $\Gamma \backslash H$ to be something else. You have to give $GL_2(Z_p)$ and $O(2)$ the right volume for both measures to coincide. The usual choice to give a compact subgroup having unit volume fails here. |