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Results tagged with ag.algebraic-geometry
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user 7614
Algebraic varieties, stacks, sheaves, schemes, moduli spaces, complex geometry, quantum cohomology.
8
votes
2
answers
3k
views
Lie algebras of algebraic groups
Where can i find material about the definition of the exponential morphism from the Lie algebra of an algebraic affine group to the group?
- 143
1
vote
0
answers
212
views
1-Parameter subgroups
Let $G$ be an affine reductive group defined over a field of characteristic zero $k$, denote by $\bar{k}$ the algebraic closure of $k$, and by $k^{\times}$ the multiplicative group of $k$. Let $Z(G)$ …
- 143
2
votes
0
answers
647
views
Closed orbits and reductive groups
Let $G$ be a reductive algebraic group defined over a field $k$ and $X$ an affine $G$-variety.
In the case $k$ is algebraically closed we have the following result:
Let $x\in X$ such that the orbit …
- 143