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 Oct17 comment Limit of a 0/0 function A hard requirement of the usability of l'Hôpital's rule is that the resulting "right-hand-size" is exists. But I guess that's what Hans is saying in more fancy terms? Jul2 awarded Curious Jul2 awarded Excavator Jul2 revised Finite element method for the 'Particle-In-a-Box' problem in quantum mechanics corrected code formatting Jul2 suggested approved edit on Finite element method for the 'Particle-In-a-Box' problem in quantum mechanics May12 comment How is the multiplicity of a pole defined when square roots are involved? Yes, of course, never cross the branch cut, but I'll need to calculate a limiting small circle integral around that point from one side of the cut to the other if I'm to avoid them, My question is more about that than the real residue which is defined differently for these points if it even exists. May12 revised How is the multiplicity of a pole defined when square roots are involved? added 95 characters in body May12 asked How is the multiplicity of a pole defined when square roots are involved? May12 awarded Informed May7 awarded Caucus Apr11 awarded Notable Question Dec9 comment Math question please ? Complex numbers? you need a $\pm$ instead of a $+$ in your second-to-last step. I can't edit such a small typo, hence the comment. Dec9 comment Solving a geometric algebra equation When you put it like that, it seems so simple... Thanks. Dec9 accepted Solving a geometric algebra equation Dec9 comment Solving a geometric algebra equation @GiuseppeNegro thanks for the additional reference. I'll be sure to check it out! Dec8 comment Solving a geometric algebra equation a,b, and c are vectors, $\alpha$ is a scalar. Juxtaposition is geometric product, dot is inner product. Dec8 asked Solving a geometric algebra equation Dec3 answered Differential of square $d(w^2)$or square of differential$(dw)^2$!? Dec3 revised Limit of this indeterminate form. nominator->numerator Dec3 revised For $z =\frac{ xy}{x+y}$, why is $z < x$ and $z < y$ for all values of $x > 0$ and $y > 0$? nominator->numerator