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Sep
10
answered Find a vector parallel to the intersection of the planes $2x-3y+5z=2$ and $4x+y-3z=7$
Sep
10
revised Find a vector parallel to the intersection of the planes $2x-3y+5z=2$ and $4x+y-3z=7$
edited tags
Sep
9
comment If $G$ is a finite group whose $p$-Sylow subgroup $P$ lies in its center, then there is a normal subgroup $N$ of $G$ with $P\cap N=\{e\}$ and $PN=G$
This is Burnside transfer theorem I think.
Sep
9
revised If $G$ is a finite group whose $p$-Sylow subgroup $P$ lies in its center, then there is a normal subgroup $N$ of $G$ with $P\cap N=\{e\}$ and $PN=G$
edited tags
Sep
9
answered Is there a simple group of order $105$?
Sep
9
revised Is there a simple group of order $105$?
edited tags
Sep
9
revised Find convergence of series …
added 16 characters in body
Sep
8
awarded  Enlightened
Sep
8
awarded  Nice Answer
Sep
7
revised Is this series divergent or convergent?
added 14 characters in body
Sep
7
revised Is this series divergent or convergent?
added 8 characters in body; edited tags
Sep
7
comment Integrating $d\psi=(x+y)dx +x_0dy$
y+(1+y/x)=0 you mean?
Sep
7
revised When an Abelian group is cyclic
edited tags
Sep
7
comment Is there a composite integer $n \geq 9$ such that $n \nmid (n-1)!$?
@Comeseeconquer: From 9 to 10^5, there is no such that number. I examined it. So we have to prove it probably.
Sep
7
answered Cauchy problem, differential equation
Sep
7
revised Does there exist a non-abelian group with roots?
added 3 characters in body
Sep
7
comment How to Integrate $\int\frac{(x^2)}{\sqrt{7-x^2}}dx$.
I know another substitution. Would u like to know it? :)
Sep
7
revised Greatest common divisor problem involving $a^p+b^p$
added 9 characters in body
Sep
7
answered Proof an inequality by mathematical induction
Sep
7
revised Calculating number of elements commmuting with $\sigma\in S_{10}$
edited tags