Timeline for What is the difference between homology and cohomology?
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| Apr 10, 2010 at 21:49 | comment | added | Tilman | You seem to be describing homotopy and cohomotopy and not homology. By a stretch of imagination, your intuition of homology might be somewhat OK, but cohomology is very far from maps into spheres. | |
| Apr 10, 2010 at 16:39 | history | answered | Algebraist | CC BY-SA 2.5 |