Timeline for Stable graphs: Feynman diagrams and Deligne-Mumford space
Current License: CC BY-SA 2.5
5 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Apr 25, 2010 at 15:56 | answer | added | Dylan Thurston | timeline score: 6 | |
| Apr 23, 2010 at 13:38 | answer | added | user1504 | timeline score: 5 | |
| Apr 23, 2010 at 7:08 | answer | added | Kelly Davis | timeline score: 7 | |
| Apr 23, 2010 at 5:34 | comment | added | Theo Johnson-Freyd | One can "explain" why such graphs show up in path-integral QFT in the following way: they exactly parametrize the $\hbar \to 0$ asymptotics of finite-dimensional integrals of the form $\int\exp\bigl((i\hbar)^{-1}f(x)\bigr)dx$, where $f(x)\in C^\infty(\mathbb R^n)[[\hbar]]$. (More generally, the asymptotics only depend on the Taylor coefficients of $f$ near critical points of $[f]\in C^\infty(\mathbb R^n)=C^\infty(\mathbb R^n)[[\hbar]]/\hbar$.) But this isn't the kind of explanation you are looking for, since it does not explain the coincidence with geometry. And I don't know any geometry. | |
| Apr 23, 2010 at 2:51 | history | asked | Kevin H. Lin | CC BY-SA 2.5 |