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 Apr 8 answered Well/Ill posedness on Generalized heat equation Apr 2 comment Separation of variables for PDE: dividing by zero? As you said, separation of variables is a method to find the explicit form of the solution. The justification is "it works". The uniqueness should be obtained later (by a standard contradiction argument, for instance). Furthermore, the possibility of losing some solution appears at the same time we make the ansatz of sepration of variables $$u(x,y)=X(x)Y(y).$$ Mar 29 accepted FreeFem++ code approximating the Laplace equation Mar 3 awarded Curious Dec 7 answered Some basic technical questions on the Leibniz integral rule (differentiation under the integral), Dec 6 comment Inequality regarding the logarithm Thank you very much Dec 6 accepted Inequality regarding the logarithm Dec 5 comment Inequality regarding the logarithm Ooops I wrote the inequality wrong... Please, take a look at it now. I found the inequality in this paper (equation (10)) Wow, this is surprising :-). I found the equation in this paper (equation 10): uni-graz.at/~fellnerk/preprints/DFIFIP.pdf Dec 5 revised Inequality regarding the logarithm edited body Dec 4 asked Inequality regarding the logarithm Nov 19 comment FreeFem++ code approximating the Laplace equation As is a math problem and a math-related code, I think that this may be the appropriate place. In any case, do you have any suggestion on the appropriate place? Nov 19 asked FreeFem++ code approximating the Laplace equation Nov 17 comment Identification of a weak limit using pointwise a.e. convergence If I understood correctly, $b_n(t)$ are not uniformly bounded in $L^\infty$. Are they uniformly bounded in $L^p$ for $1\leq p<\infty$? Nov 1 answered Change of Variables of Reaction-Diffusion Equation into Heat Equation Aug 24 answered What is the essential difference between ordinary differential equations and partial differential equations? Aug 15 revised Shock formation in an inviscid Burger's like equation added 1118 characters in body Aug 15 comment Shock formation in an inviscid Burger's like equation Ok, let me add another answer because I do not have enough space in this comment. Aug 14 answered Shock formation in an inviscid Burger's like equation May 15 awarded Yearling May 1 answered logarithmic sobolev inequalities