Re: Question about the Ext-functor.
- From: Robin Chapman <rjc@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
- Date: Thu, 09 Jun 2005 14:09:25 +0100
AMN wrote:
> I need to show that for a ring A, an A-module M and x not in the
> zerodivisors of M, then
>
> Ext_A ^{m+1} (-,M) is isomorphic to Ext_{A/(x)} ^m (-,M/(x)).
Is this actually true? The right side is killed by x, while
the left side need not be...
--
Robin Chapman, www.maths.ex.ac.uk/~rjc/rjc.html
"Elegance is an algorithm"
Iain M. Banks, _The Algebraist_
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