User 24601

less info
reputation
6
bio website location age member for 4 months seen 7 hours ago profile views 80

86 Actions

 18h revised The derivative of a family of flowsClarified Example 2. 19h revised The derivative of a family of flowsAdded introductory question at top 21h asked The derivative of a family of flows Apr30 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. Apr30 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. Apr26 asked “Product” bundle notation. Apr17 answered Tensor algebra of Dg-algebra Apr17 answered Restriction map on a compact orientable manifold without a boundary. Apr15 comment Find norm of the integral operatorHave you tried integration by parts on $\int_0^1 x(s) {1 \over s}(1 - e^{-s}) ds$? Apr15 answered Question about covering spaces concerning a one-sheeted covering map Apr14 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. ($(M_{n,m})^{op} \cong M_{m,n}$.) Apr12 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. Apr12 revised Does the derivative of the derivative depend on a choice of connection?Put question at top. Apr12 comment Universal Cover of a spaceI 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. Apr12 comment A symmetric matrix whose square is zeroAh, my fault. I mistook "characteristic" for "minimal". Apr11 comment A symmetric matrix whose square is zero"Distinct" linear factors isn't quite true--take the matrix to be the identity. Apr11 asked Does the derivative of the derivative depend on a choice of connection? Apr3 comment Reflections in regular polygonsYou should google search for "billiards" and the name Rich Schwarz. Jan18 revised Intuition behind topological spacesadded 18 characters in body Jan18 answered Intuition behind topological spaces