Mathematics
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Apparently, this user prefers to keep an air of mystery about them.

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3 How to compute the the last digit of $122^{122}$? [duplicate] Dec 21 '20
2 How to show that the rotation map $f$ is not a gradient of a convex function? Sep 27 '20
1 If $A$ with a size of $n\times 200$, does the inverse of $AA^T$ always exist? [duplicate] Sep 27 '20
1 How to get the following limit: $\lim_{(x,y)\to (0,0)}\frac{x^4y}{x^8+y^2}=?$ Aug 17 '20
1 How to use $\epsilon$-$\delta$ to show that following is less than $\epsilon$? Sep 18 '20
1 why can we get $\frac{\partial q_t(x,y)}{\partial t}=\Delta q_t(x,y)?$ Feb 21
1 How to show that $\sum_{i\ge i_0} \frac{i^2}{4^i}\to 0$ Nov 6 '20
1 How to conclude that $\sum_{n>e^t} f_t(n)<e^{-t}?$ Feb 23
0 How to get $P_x(X_t=x, \tau<t)=P_{X_{\tau}}(X_{t-\tau}=x)\mathbb{E}_x\mathbb{1}_{\tau<t}$? Feb 22
0 For $x\in [0,1]$, what is the maximal value of the following function? Feb 20
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