cactus314
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 Mar 15 awarded Notable Question Mar 11 revised Bijective proof of $\sigma_0(m) \,\sigma_0(n) = \sum_{r | (m,n)} \sigma_0( mn / r^2)$? edited title Mar 11 revised Bijective proof of $\sigma_0(m) \,\sigma_0(n) = \sum_{r | (m,n)} \sigma_0( mn / r^2)$? added 2 characters in body Mar 11 asked Bijective proof of $\sigma_0(m) \,\sigma_0(n) = \sum_{r | (m,n)} \sigma_0( mn / r^2)$? Mar 9 revised Simplify Product of sines added 510 characters in body Mar 9 answered Simplify Product of sines Mar 4 revised Why is $1 - \frac{1}{1 - \frac{1}{1 - \ldots}}$ not real? added 188 characters in body Mar 4 comment Why is $1 - \frac{1}{1 - \frac{1}{1 - \ldots}}$ not real? Notice that $n \geq 2$. In this guy's example $n \equiv 1$. Mar 4 answered Why is $1 - \frac{1}{1 - \frac{1}{1 - \ldots}}$ not real? Mar 2 revised Show that $\sum_{\mathbb{Z}/N\mathbb{Z}} f(n) g(n+r)h(n+2r) = \sum_{a \in \mathbb{Z}/N\mathbb{Z}} \hat{f}(a)\hat{g}(-2a)\hat{h}(a)$ partial progress Mar 2 asked Show that $\sum_{\mathbb{Z}/N\mathbb{Z}} f(n) g(n+r)h(n+2r) = \sum_{a \in \mathbb{Z}/N\mathbb{Z}} \hat{f}(a)\hat{g}(-2a)\hat{h}(a)$ Feb 7 comment Show that $J_n(x)$ satisfies Bessel equation $x^2 \frac{d^2 y}{dx^2} + x \frac{dy}{dx} + (x^2 - n^2)y = 0$ Feb 7 asked Show that $J_n(x)$ satisfies Bessel equation $x^2 \frac{d^2 y}{dx^2} + x \frac{dy}{dx} + (x^2 - n^2)y = 0$ Feb 6 answered Representing a linear operator on $V$ with an element of $V \otimes V^*$ Feb 4 accepted How to derive $\sum_{n=0}^\infty 1 = -\frac{1}{2}$ without zeta regularization Jan 29 accepted Does $\overline{ \sqrt{1 + i}} = \sqrt{1-i} \$? Jan 29 comment Does $\overline{ \sqrt{1 + i}} = \sqrt{1-i} \$? The paper that I am reading is unusual as they are cutting along $\mathbb{R}^+$ instead of $\mathbb{R}^-$ I should have mentioned that thanks. Jan 29 comment Does $\overline{ \sqrt{1 + i}} = \sqrt{1-i} \$? what if you cut at positive reals? Jan 29 asked Does $\overline{ \sqrt{1 + i}} = \sqrt{1-i} \$? Jan 26 answered If $[x+0.19] +[x+0.20] +[x+0.21] +\cdots [x+0.91] =546$ find the value of $[100x]$..