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Questions
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When is there a deRham duality relation between the fundamental class and a top form.?

jun 24 10 at 0:01 Somnath Basu 1,692●1●9●18

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Correlation and Causation. When can we believe correlation (reasonably, at least) imply causation

jul 19 10 at 23:54 Yaroslav Bulatov 1,110●4●17

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triangulations of torus, general, and Euler number. (Hopefully more interesting/relevant)

apr 26 10 at 17:28 John Palmieri 1,824●1●7●15

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Request: intermediate-level proof: every 2-homology class of a 4-manifold is generated by a surface.

nov 10 at 21:28 Leonard 466●10