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visits member for 2 years, 1 month
seen 5 hours ago

Jul
2
awarded  Curious
Jul
1
answered If $X$ is distributed normally with mean $0$, is it correct to say $X$ and $-X$ “have the same distribution”?
May
16
revised Zariski topology as weak topology
rolled back to a previous revision
May
15
awarded  Yearling
May
10
answered How find a example such this set condition?
May
2
comment Calculating this integral: $I=\int_{0}^{\infty}(\log t)\,(\tan^2t)\,\mathrm{d}t$
You have bounds $0$ and $\infty$ in the title but some other numbers in the body, which is it?
Apr
11
revised Minimum number of combinations
added 974 characters in body
Apr
11
answered Minimum number of combinations
Apr
10
comment Help with this combinatorial proof $\sum\limits_{k=1}^nk^2(k-1){n\choose k}^2 = n^2(n-1){2n-3\choose n-2}$ considering $n\ge2$
Where did you get this formula? left-hand side gives $480$ and right hand side gives $160$ for $n=4$...
Apr
10
comment What does this equal? $6\div 2(1+2)$
how does someone get $7$?
Apr
10
reviewed Approve suggested edit on Sudoku candidate probability
Apr
10
comment Are the two integrals equivalent?
Yes they are indeed the same
Apr
9
reviewed Edit suggested edit on Is my second equation right?
Apr
9
revised Is my second equation right?
Use Mathjax
Apr
9
reviewed Approve suggested edit on How to use the Maclaurin Series to get $f^{10}(0)$ of $f(x)=(\cos(3x^2)−1)/x^2$
Apr
9
reviewed Reject suggested edit on Finding the point on the curve at which the normal is parallel to a given line.
Apr
9
revised Convert from base 10 to base 5
improved formatting
Apr
9
awarded  Enlightened
Apr
9
awarded  Nice Answer
Apr
8
revised Convert from base 10 to base 5
added 142 characters in body