On Fri, 19 Jun 2009, Andrew Stacey wrote:
I'm not sure if this is quite what you are looking for, but the topology on cohomology theories is given as an inverse limit (if I have my limits the correct way round) over the finite skeleta.
Not really a contribution to the mathematical question, but I'm struck by the fact that both Andrew Salch and Andrew Stacey, in their replies to Steve Vickers, use the plural "skeleta". I used to do that when I was a student, as a way of winding-up my teachers, but it isn't justifiable. The English word "skeleton" is indeed derived from a Greek root (the past participle of the verb "skellein", to wither or dry up), but it doesn't exist as a noun in Greek. There is therefore no justification for giving it an imagined Greek plural. Having in my time devoted some effort to fighting the bogus (but in fact more justifiable) Greek plural "topoi", I feel bound to protest against this one too. Peter Johnstone [For admin and other information see: http://www.mta.ca/~cat-dist/ ]