User Bill Kronholm

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Popular Question

Nov 8, 2013 at 3:21

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Jun 25, 2013 at 3:08

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Notable Question

Feb 24, 2013 at 23:35

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Yearling

Mar 29, 2012 at 0:05

answered

Aug 30, 2011 at 2:49

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asked

Jul 27, 2011 at 6:17

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The Euler class of (the tangent bundle of) a manifold only makes sense for an oriented manifold. So, does what still hold?

May 4, 2011 at 3:52

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Homology or cohomology?

I've always considered that homology of a chain complex is homology, and homology of a cochain complex is cohomology.

May 1, 2011 at 16:27

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Apr 29, 2011 at 22:18

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Groupoid actions on spaces

This is indeed a natural example! Thanks!

Apr 29, 2011 at 22:18

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Groupoid actions on spaces

Thanks Stefan. My library doesn't have a copy of this, so it will be a few days before I can take a look at the examples Moerdijk and Mrcun give.

Apr 29, 2011 at 22:02