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seen Jan 22 at 16:09

7h
awarded  Self-Learner
Jan
15
accepted A topological space with a transitive action.
Jan
15
asked A topological space with a transitive action.
Jan
7
accepted Polynomials $X^n$ and $(1-X)^n$ are coprime
Jan
7
comment Polynomials $X^n$ and $(1-X)^n$ are coprime
Hugues : What do you mean by prime divisor here? irreducible ?
Jan
7
asked Polynomials $X^n$ and $(1-X)^n$ are coprime
Dec
12
awarded  Notable Question
Dec
11
accepted A sequence of roots of polynomials depending on an integer parameter
Dec
11
revised A sequence of roots of polynomials depending on an integer parameter
edited body
Dec
11
comment A sequence of roots of polynomials depending on an integer parameter
@Daneil R Actually we want to show that $Q_n(x_n)=1$. I edited the question thanks.
Dec
11
asked A sequence of roots of polynomials depending on an integer parameter
Dec
3
awarded  Popular Question
Nov
15
awarded  Popular Question
Sep
30
awarded  Explainer
Sep
27
comment The number of $p$-subsets of an $n$-set is $n$ choose $p$
It is $\dfrac{n!}{p!(n-p)!}$
Sep
27
revised The number of $p$-subsets of an $n$-set is $n$ choose $p$
added 1 character in body
Sep
27
asked The number of $p$-subsets of an $n$-set is $n$ choose $p$
Sep
25
comment An injective map between two sets of the same cardinality is bijective.
Thank you very much!!
Sep
25
accepted An injective map between two sets of the same cardinality is bijective.
Sep
25
comment An injective map between two sets of the same cardinality is bijective.
Chevalier et Oudot - "Maths MPSI, H prepa tout en un" page 172.