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18h
revised The derivative of a family of flows
Clarified Example 2.
19h
revised The derivative of a family of flows
Added introductory question at top
21h
asked The derivative of a family of flows
Apr
30
comment “Product” bundle notation.
@WillieWong, your notation describes the vector bundle correctly, but leaves out the structure of $spin(n+n')$'s action--if there's no standard notation, I guess I'll just have to live with it.
Apr
30
comment “Product” bundle notation.
@WimC : Wouldn't external product, for instance, produce a line bundle when $P$ and $P'$ are line bundles? It seems like the external product uses a tensor product where I would want a direct sum.
Apr
26
asked “Product” bundle notation.
Apr
17
answered Tensor algebra of Dg-algebra
Apr
17
answered Restriction map on a compact orientable manifold without a boundary.
Apr
15
comment Find norm of the integral operator
Have you tried integration by parts on $\int_0^1 x(s) {1 \over s}(1 - e^{-s}) ds$?
Apr
15
answered Question about covering spaces concerning a one-sheeted covering map
Apr
14
comment $M_{m×n}$ and $M_{n×m}$ are isomorphic?
It depends on the kind of isomorphism you want to show. It's clearly an isomorphism as vector spaces. And it's obviously an isomorphism of algebras once you pass to an opposite algebra. ($(M_{n,m})^{op} \cong M_{m,n}$.)
Apr
12
comment Does the derivative of the derivative depend on a choice of connection?
Thanks! I put the question closer to the top; I left in my work so someone would have an idea of what I did.
Apr
12
revised Does the derivative of the derivative depend on a choice of connection?
Put question at top.
Apr
12
comment Universal Cover of a space
I think you rather mean a string of pearls---you don't want the sphere attached to an integer point. Rather you want to delete an interval of the integer point and glue in the sphere, one pole at each of the two boundary points of the interval.
Apr
12
comment A symmetric matrix whose square is zero
Ah, my fault. I mistook "characteristic" for "minimal".
Apr
11
comment A symmetric matrix whose square is zero
"Distinct" linear factors isn't quite true--take the matrix to be the identity.
Apr
11
asked Does the derivative of the derivative depend on a choice of connection?
Apr
3
comment Reflections in regular polygons
You should google search for "billiards" and the name Rich Schwarz.
Jan
18
revised Intuition behind topological spaces
added 18 characters in body
Jan
18
answered Intuition behind topological spaces