ziyuang
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 Jan 7 revised Solve linear algebra expressions 3x3 -> 3\times 3 Jan 7 suggested approved edit on Solve linear algebra expressions Jan 7 revised Mistake in Taylor expansion? Texify the question Jan 7 suggested approved edit on Mistake in Taylor expansion? Jan 4 comment Kullback–Leibler divergence with elements that are $0$ How about additive smoothing? Dec 16 comment Find derivative of $f(x)=(x+2)^{(x-1)}$ OK, I get it. It has nothing to do with the logarithm. Dec 16 comment Find derivative of $f(x)=(x+2)^{(x-1)}$ Sounds like the same as $f$ except for the positiveness. Dec 16 revised Find derivative of $f(x)=(x+2)^{(x-1)}$ Change ln to \ln Dec 16 suggested approved edit on Find derivative of $f(x)=(x+2)^{(x-1)}$ Dec 16 comment Find derivative of $f(x)=(x+2)^{(x-1)}$ What are $a$, $b$ and $c$ here? Nov 12 comment solution of $y^2 - x = 15$ and $x^2 -xy = 2009$ What do you mean by the symbol "|". Nov 12 comment Infinite self-convolution for a function Convolution corresponds to the PDF of the sum of random variables. I think something can be obtained by the law of large numbers. Sep 9 comment What are some examples of mathematics that had unintended useful applications much later? I think this is kind of "application in mathematics". Sep 5 comment Permutation matrix notation You may borrow the notations from permutation group en.wikipedia.org/wiki/Permutation_group Sep 5 revised Extension of Sobolev functions Texified the question Sep 5 suggested approved edit on Extension of Sobolev functions Sep 1 comment If $A\geq B$ and $A>C$, then does it follow that $B>C$? Just post your "inequalities about the inf and sup of the range of functions" Aug 23 awarded Necromancer Jun 17 comment Mathematica: How to convert scales to frequencies? @Ｊ.M. Well, it should have been in MMA.SE Jun 17 comment Suppose that a $3\times 3$ matrix $M$ has an eigenspace of dimension $3$. Prove that $M$ is a diagonal matrix. @user46080 Well, OK, calm...