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 Jul17 revised Best way to set up a wiki for maintaining a structured math journal edited title Jul17 revised Best way to set up a wiki for maintaining a structured math journal edited title Jul17 revised Best way to set up a wiki for maintaining a structured math journal deleted 91 characters in body Jul17 revised Best way to set up a wiki for maintaining a structured math journal added 490 characters in body Jul17 revised Best way to set up a wiki for maintaining a structured math journal added 125 characters in body Jul17 revised Best way to set up a wiki for maintaining a structured math journal added 1081 characters in body Jul17 revised Best way to set up a wiki for maintaining a structured math journal deleted 1011 characters in body Jul17 revised Best way to set up a wiki for maintaining a structured math journal deleted 1011 characters in body Jul16 revised Where is the mistake in this reasoning? edited tags Jul16 revised Where is the mistake in this reasoning? added 253 characters in body Jul13 revised Quick way to expand $\cos^{-1}(\cos^2 x)$ up to $O(x^2)$ added 326 characters in body Jul13 revised Relation of this antisymmetric matrix $r = \left(\begin{smallmatrix}0 &1\\-1&0\end{smallmatrix}\right)$ to $i$ edited title Jul10 revised Help me formalize this calculation added 204 characters in body Jul10 revised Help me formalize this calculation added 60 characters in body Jul4 revised What strategy do you use when solving vector equations involving $\nabla$? edited tags Jul2 revised To prove there exist two relatively prime numbers in a finite set added 43 characters in body Jul1 revised calculate the Probability density function of the absolute difference of two random variable equation formatting, changed fonction to function Jun29 revised Pairwise prime triples of integers satisfying $x^2+y^2=z^2$ added 6 characters in body Jun28 revised Pairwise prime triples of integers satisfying $x^2+y^2=z^2$ added 23 characters in body Jun27 revised Proof that $\sum\limits_{k=1}^nk^2 = \frac{n(n+1)(2n+1)}{6}$? added 221 characters in body