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Timeline for Regularity in terms of jets?

Current License: CC BY-SA 3.0

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Apr 17, 2012 at 14:43 comment added user20544 Indeed, they will not coincide, but, why is this a problem?
Mar 6, 2012 at 18:52 comment added Graham Leuschke Why not the second entry? The two will not coincide.
Mar 6, 2012 at 15:38 comment added user20544 $I=Ker\phi$ where $\phi:B\otimes B\rightarrow B$, $\phi(b\otimes b')=bb'$. We can make $B\otimes B$ an $B$-module via multiplication on the first entry, so that $I$ and therefore $I/I^{n+1}$ is also a $B$-module.
Mar 6, 2012 at 12:25 comment added Graham Leuschke $I/I^{n+1}$ isn't annihilated by $I$ for $n \geq 1$, so isn't a $B$-module. In particular, your short exact sequence is not a s.e.s. of $B$-modules.
Mar 6, 2012 at 11:36 history asked user20544 CC BY-SA 3.0