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May
13
awarded  Caucus
Apr
16
accepted Is there a problem with this example?
Mar
29
asked Is there a problem with this example?
Mar
4
awarded  Revival
Feb
12
awarded  Nice Question
Feb
4
comment Let $A,B$ be two subgroups of $G$. Show that $g(A\cap B)=gA \cap gB$ for all $g \in G$
This would be easier to think about if you took $c \in A \cap B$. So this would rephrase your first step to $gc \in g(A \cap B)$. The result basically follows from here.
Dec
14
awarded  Revival
Sep
21
awarded  Custodian
Sep
15
awarded  Nice Question
Aug
13
awarded  Necromancer
Aug
4
awarded  Revival
Jul
28
answered If $p$ is a factor of $m^2$ then $p$ is a factor of $m$
Jul
17
comment How to solve this Pell's equation $x^{2} - 991y^{2} = 1 $
Read this.
Jul
12
awarded  Revival
Jul
6
revised Solve the simultaneous congruences: $2n + 6m\equiv 2 \pmod{10}$ and $n + m\equiv -2 \pmod{10}$
edited body; added 1 characters in body
Jul
6
answered Solve the simultaneous congruences: $2n + 6m\equiv 2 \pmod{10}$ and $n + m\equiv -2 \pmod{10}$
Jul
3
comment Riemann Zeta formula
Related mathoverflow.net/questions/59770/…
Jul
3
revised infinite number of irreducible polynomials in $\mathbb{Z}/2{\mathbb Z}[X]$
edited title
Jul
2
comment Your favourite application of the Baire Category Theorem
mathoverflow.net/questions/56323/… and math.stackexchange.com/questions/135947/…
Jul
2
awarded  Civic Duty