Juan Sebastian Totero
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 Feb 16 awarded Popular Question Jun 11 comment building an orthogonal grid on 2d unbounded domain by solving laplace's equation using FEM Thanks Eric, I will try that and will come back :) Jun 4 awarded Promoter May 31 asked building an orthogonal grid on 2d unbounded domain by solving laplace's equation using FEM May 31 comment Distortion in spherical coordinates Thanks for your answer, resurrected the question to mark it as answered :) May 31 accepted Distortion in spherical coordinates May 1 asked Distortion in spherical coordinates Oct 2 comment integration by parts using gradient @Christopher : I know, but for sake of clarity, enzo has been more explicit, so this is the right answer :) this is a difficult situation :) Sep 29 comment Minimum value of an integral. Can't you just work with the sign of the derivative? $\phi$ is >0 on the whole interval, that means its integral is positive... Sep 29 comment integration by parts using gradient Yes the surface term is missing in Chistopher's answer, so despite he arrived early, I have to set yours as right :) Grazie Enzo :) Sep 29 accepted integration by parts using gradient Sep 29 comment integration by parts using gradient Thanks, this is exactly what I did to solve this integral, but in the paper is not mentioned at all whether the $u$ are harmonic functions, and that's what drives me nuts :) ... The only information I have is that they are Fourier Transformable, but at this point I must suppose they forced the function either to be harmonic, or to be zero on the surface (this is a physics paper, and they do that very often)... Sep 29 asked integration by parts using gradient Sep 29 awarded Scholar Sep 29 awarded Supporter Sep 29 accepted projection of a function on an orthogonal set Sep 8 awarded Student Sep 1 revised projection of a function on an orthogonal set added 7 characters in body Sep 1 comment projection of a function on an orthogonal set Sorry, I wrote it wrong... the basis is different from the other one :) Sep 1 awarded Editor