3,310 reputation
1631
bio website
location
age
visits member for 2 years, 5 months
seen 4 hours ago

Oct
5
comment What is meant by“…on se ramène par régularisation…”?
Careful, "Dénombrable à l'infini" does not mean countably infinite. It is rather linked with a locally compact spaces. I think it means that the space can be written has a countabble compacts family
Oct
5
reviewed Looks OK Let $n $ be an integer. Prove that if $ 2|n$ and $3|n$, then $6|n$
Oct
5
reviewed Looks OK Let $n $ be an integer. Prove that if $ 2|n$ and $3|n$, then $6|n$
Oct
5
reviewed Looks OK Summation of polynomial expression
Oct
5
awarded  Custodian
Oct
5
reviewed Leave Open Probability of two vehicles meeting
Sep
30
awarded  Explainer
Sep
23
comment Why is the polynomial $f(x)=x^3+x^2+x+1$ monotonic?
You can upvote all relevant, and accept (and also upvote) the one that suits you best
Sep
22
comment Prove that $f(x)=x^4+8x^3+x^2+2x+5$ is irreducible in $\mathbb Q[x]$
Do you know the rational root test?
Aug
8
revised How many $4$ digit even numbers have all $4$ digits distinct?
added 1 character in body
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
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