Aftnix
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 Jan 18 comment Solving to get free falling coordinate as function of arbitrary coordinate @MarkWayne yes i'm saying " how i can obtain the solution" Jan 16 comment Solving to get free falling coordinate as function of arbitrary coordinate Thanks for the noticing that. I've corrected it Dec 30 comment eigen value of the gradient operator thanks a lot. That does it. I will try to reconstruct this for spherical coordinates. Jul 24 comment Check if below limits exist $\lim_{(x,y,z) \to (0,0,0)} \left( {\frac{{2{x^2}y - x{z^2}}}{{y^2 - xz}}} \right)$? wonderful solution. +1 Jul 23 comment This classic from euclid's elements, is it accepted everywhere? So its comes from the need of having a notion of "equality" which makes sense? Jul 12 comment How complex exponential converges and “sum of exponents” rule holds Thanks, thats what i was looking for. Jul 11 comment How complex exponential converges and “sum of exponents” rule holds Latex output is not correct in my browser, sometimes its ok, sometimes it not. Jul 11 comment How complex exponential converges and “sum of exponents” rule holds i know 2nd expression can be proved by binomial theorem, but failed to do so. and for the first one, if only the postulates of "complex arithmetic" is given, how it converges? May 5 comment what should be the frequency distribution of the eigenvalues of a randomly generated hermitian matrix? so it means if i increase the size of the matrix (now is 100*100) it can approach to semicircle law?