Timeline for Formalising the principle of general covariance in differential geometry
Current License: CC BY-SA 2.5
4 events
| when toggle format | what | by | license | comment | |
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| Dec 30, 2010 at 23:53 | comment | added | Deane Yang | I would add that I have no idea how to deal with an arbitrary subgroup $G$ of the group of diffeomorphisms. A more reasonable and more useful question is to ask about tensors or subspaces of tensors (at a fixed point in the manifold) that are invariant under a subgroup of $GL(v)$ (for example, $SL(v)$, $O(n)$, $U(n/2)$ for $n$ even, etc.). | |
| Dec 30, 2010 at 20:34 | comment | added | Willie Wong | To give a reference, much of the last paragraph is explained in H. Weyl, The classical groups, their invariants and representations. | |
| Dec 30, 2010 at 20:07 | comment | added | Deane Yang | MathJax remains an inscrutable mystery to me. | |
| Dec 30, 2010 at 20:06 | history | answered | Deane Yang | CC BY-SA 2.5 |