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Results tagged with deformation-theory
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user 1409
for questions about deformation theory, including deformations of manifolds, schemes, Galois representations, and von Neumann algebras.
21
votes
Introduction to deformation theory (of algebras)?
[Gerstenhaber, Murray; Schack, Samuel D. Algebraic cohomology and deformation theory. Deformation theory of algebras and structures and applications (Il Ciocco, 1986), 11--264, NATO Adv. Sci. Inst. …
- 47.3k
19
votes
Accepted
A simple proof of the Weyl algebra's rigidity.
(I write $HH^\bullet(\Lambda)$ what you write $H^\bullet(\Lambda,\Lambda)$. When I become Emperor of Notation, everyone will!)
Since $A_n\cong A_1\otimes\cdots\otimes A_1$, the Künneth formula for Ho …
- 47.3k
11
votes
Accepted
"Twisted" universal enveloping algebra?
These algebras were considered by Ramaiengar Sridharan a long time ago. See [Sridharan, R. Filtered algebras and representations of Lie algebras. Trans. Amer. Math. Soc. 100 1961 530--550. MR0130900 ( …
- 47.3k