If $a, b$ at the same orbit, then $\operatorname{stab}(a) \cong \operatorname{stab}(b)$
117701
Let $G$ be a group and $X$ set. $a,b \in X$ are in the same orbit, so show that $stab(a) \cong stab (b)$
99346
Prove a result on transitive group actions.
75117
$\mathrm{rank}(AB-BA)=1$ implies $A$ and $B$ are simultaneously triangularisable
68449
$\operatorname{Supp}(M)=V(\operatorname{Ann}M)$ if $M$ is finitely generated
120968
Isomorphism of stabilizer over $S_n$ to $S_{n-1}$
12636
Product Rule for mod operator: $ ab\bmod p = ((a\bmod p)(b\bmod p))\bmod p$
33451
Sylvester rank inequality: $\operatorname{rank} A + \operatorname{rank}B \leq \operatorname{rank} AB + n$
85299
computing the orbits for a group action
118030
Two subgroups of the same index must be conjugate under these assumptions
147564
Why does $(A/I)\otimes_R (B/J)\cong(A\otimes_R B)/(I\otimes_R 1+1\otimes_R J)$?
23224
$\mbox{rank}(A)=1$ implies $\det(A+I)=\mbox{trace}(A)+1$
74187
$\operatorname{ord}(u)=r,\,\operatorname{ord}(v)=s$ $\,\Rightarrow\,\operatorname{ord}(uv)=rs\,$ if $\,r,s\,$ (co)primes
135986
Show if $a \equiv b \pmod{m}$ then $ac \equiv bc\pmod{mc}$
18800
If A and B are symmetric is AB=BA true?
33868
A transformation between two free group actions.
133699
Proving that there is a bijection between $A$ and $B$.
148569
Embeddings $A → B → A$, but $A \not\cong B$?