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Mar
17
comment Where do summation formulas come from?
Finite calculus is one way of computing sums cs.purdue.edu/homes/dgleich/publications/…
Feb
26
comment Investigate the convergence of $\int_0^\infty (-1)^\left[{x^2}\right] \, dx$
@AlonAlon because $[x^2]$ is an integer.
Feb
26
answered Problem with evaluating the exact value of an integral
Dec
20
awarded  Constituent
Dec
8
awarded  Caucus
Nov
18
comment Are the equations $2x - 2y = 11, x = y - 2$ unsolvable?
This is most likely what was expected from the teacher
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
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?