mt
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Registered User
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May 6 |
answered | Compatibility of connecting homomorphisms for Tor/Ext |
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Feb 5 |
comment |
Nice proofs of the Poincaré–Birkhoff–Witt theorem A nice feature of the Cartan-Eilenberg proof pointed out by Mariano is that it works for Lie algebras which are free over an arbitrary commutative ring. |
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Jan 10 |
comment |
Is the universal enveloping algebra of a finite-dimensional Lie algebra (left) noetherian? You're welcome - do you have a reference for the flat deformation idea you mentioned in the question? It seems like an interesting point of view. |
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Jan 10 |
accepted | Is the universal enveloping algebra of a finite-dimensional Lie algebra (left) noetherian? |
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Jan 10 |
answered | Is the universal enveloping algebra of a finite-dimensional Lie algebra (left) noetherian? |
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Dec 31 |
comment |
(geometric/intuitive) interpretation of ext mathoverflow.net/questions/15016/… |
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Dec 15 |
revised |
papers archives? (especially not indexed by google) added 52 characters in body |
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Dec 15 |
answered | papers archives? (especially not indexed by google) |
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Nov 29 |
comment |
Is there a good computer package for working with complexes over non-commutative rings? Singular will now compute resolutions, including for a certain class of noncommutative algebras via it's Plural extension. singular.uni-kl.de |
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Nov 27 |
comment |
Computing Slim Extensions representing Ext $j$ has a kernel equal to $\operatorname{im} \iota$, so $j^{-1}(N)$ contains $\operatorname{im} \iota$ and is never zero. In the case you describe, the sequence splits. |
