Timeline for Pushforward and pullback.
Current License: CC BY-SA 2.5
6 events
| when toggle format | what | by | license | comment | |
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| Nov 12, 2010 at 2:08 | comment | added | ε-δ | I want to see the meaning of "pushforward/pullback", not just a bunch of examples... I agree, it should have some categorical meaning, but I know almost nothing about categories. | |
| Nov 11, 2010 at 22:36 | comment | added | David Roberts♦ | Ah, I see some of the confusion. There are notions of pullback and pushforward for things like n-forms (which include functions) which is subtly different from pullback and pushforward to sheaves/bundles (but I would be wary of talking about pushforward for bundles). 'Pullback' of a function is just precomposition. Pushforward is integration, when it is possible. PS functions are sections of trivial vector bundles - so you really want to think about the pullback (say) of the sheaf of sections of the vector bundle. | |
| Nov 11, 2010 at 16:45 | comment | added | ε-δ | I'm sorry, but can you think say of a function on Y as a vector bundle over Y? | |
| Nov 11, 2010 at 12:14 | history | edited | David Carchedi | CC BY-SA 2.5 |
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| Nov 11, 2010 at 10:56 | history | edited | KConrad | CC BY-SA 2.5 |
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| Nov 11, 2010 at 7:06 | history | answered | David Carchedi | CC BY-SA 2.5 |