Timeline for Whitney sum formula for topological Pontryagin classes
Current License: CC BY-SA 4.0
6 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| May 22, 2020 at 17:29 | comment | added | skd | Ah, yes. Sorry, didn't read carefully enough. | |
| May 22, 2020 at 14:20 | vote | accept | Igor Belegradek | ||
| May 22, 2020 at 12:40 | comment | added | Igor Belegradek | @sdk: Brown's paper is about vector bundles, while my question is about locally trivial bundles with fiber homeomorphic to $\mathbb R^n$. | |
| May 22, 2020 at 7:05 | answer | added | Oscar Randal-Williams | timeline score: 8 | |
| May 22, 2020 at 4:23 | comment | added | skd | Let p(E) denote the total (integral) Pontryagin class of a real bundle E. It's not too hard to show that p(E (+) F) = p(E) * p(F) mod 2-torsion. The 2-torsion term is stated in Theorem 1.6 of Brown's "The Cohomology of BSO_n and BO_n with Integer Coefficients". | |
| May 22, 2020 at 2:07 | history | asked | Igor Belegradek | CC BY-SA 4.0 |