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 Mar 12 asked (Question) on Time-dependent Sobolev spaces for evolution equations Mar 12 answered Why abstract manifolds? Mar 11 accepted Accelerated Order of Convergence Mar 11 asked Accelerated Order of Convergence Mar 10 accepted When is the image of a linear operator closed? Mar 9 asked When is the image of a linear operator closed? Mar 7 comment How to find basis for intersection of two vector spaces The procedure can be described as: (i) put down a list of the basis vectors of $U$ and $W$ (ii) Perform base changes on both list until a common vector appears. Keep that one. Repeat for the other vectors, until no common vectors can be found anymore. Feb 24 comment Create unique number from 2 numbers You do not specify what you mean by making a number out of two numbers. Feb 24 comment How can $\frac{1}{a/x-b/x}$ be equal to $\frac{1}{a-b}$? which books is this from? Feb 24 asked Realification and Complexification of vector spaces Feb 23 accepted On the isometry between bounded linear operators and the dual of nuclear linear operators Feb 22 revised On the isometry between bounded linear operators and the dual of nuclear linear operators corrected title Feb 22 asked On the isometry between bounded linear operators and the dual of nuclear linear operators Feb 20 answered How to effectively and efficiently learn mathematics Feb 20 comment Heat kernel has uniformly bounded derivatives Thank you very much. It seems I misunderstood the meaning of uniformly bounded. Feb 20 accepted Heat kernel has uniformly bounded derivatives Feb 19 comment Heat kernel has uniformly bounded derivatives Mea culpa. It has been a typo. Feb 19 comment Why $\frac{x}{x+1}=\frac{1}{x^{-1}+1}$ It might be helpful to note, that there is a blow-up at -1, as expected while at 0 the right expression is formally undefined, but it makes sense give it the value 0 (by continouos extension, if you know this). Plotting this function might help you. Feb 19 revised Heat kernel has uniformly bounded derivatives added 34 characters in body Feb 19 comment Heat kernel has uniformly bounded derivatives I am very sorry for the typo in the exponent and that I missed to mention the domain on which to bound the kernel. I have corrected this -- the question is important when it comes to show the integrability of the convolution with the heat kernel.