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Results tagged with rt.representation-theory
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user 98560
Linear representations of algebras and groups, Lie theory, associative algebras, multilinear algebra.
2
votes
0
answers
173
views
Quotient of a finite morphism by an action of a reductive group is still finite?
Let $X, Y$ be two quasi-affine schemes over $\mathbb{C}$. Let $G$ be a reductive algebraic group. Suppose that we are given an action of $G$ on $X,Y$ and a $G$-equivariant
finite morphism $X \rightarr …
- 143
7
votes
0
answers
250
views
$D(\mathcal{O}(n))$ via generators and relations
Let $V$ be a complex vector space. Consider the algebra $D(\mathbb{P}(V),\mathcal{O}(n)))$ of global differential operators from line bundle $\mathcal{O}(n)$ to itself, here $n \in \mathbb{Z}_{\geqsla …
- 143
5
votes
1
answer
163
views
Ideal of the boundary of $G/U \subset \overline{G/U}$
Let $G$ be a semi simple algebraic group, $B \subset G$ is a Borel subgroup and $U \subset B$ is the unipotent radical of $B$. We can consider the variety $G/U$. Let us also denote $\overline{G/U}:=\o …
- 143