Timeline for Derived functor
Current License: CC BY-SA 2.5
5 events
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| Nov 8, 2016 at 8:54 | comment | added | user20948 | Do you have any reference for beginners/laymen? The definition of derived functors as Kan extensions doesn't explain the story: why one should consider the Kan extensions, the universal object instead of arbitrary weak ones. In the topological world, the explanation (of homotopical limits/colimits) is more unfounded: they just say that ordinary limits/colimits are not well-defined under homotopy, but they don't explain why the one they defined is a good one. | |
| Feb 16, 2011 at 19:20 | comment | added | Sean Tilson | I have not read this and already I don't see a good reason for the downvote... | |
| Nov 30, 2010 at 10:29 | history | edited | Harry Gindi | CC BY-SA 2.5 |
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| Nov 30, 2010 at 9:59 | history | edited | Harry Gindi | CC BY-SA 2.5 |
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| Nov 30, 2010 at 9:52 | history | answered | Harry Gindi | CC BY-SA 2.5 |