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- Reflexive Generalized Inverse - Mathematics Stack Exchange
Definition: G is a generalized inverse of A if and only if AGA=A G is said to be reflexive if and only if GAG=G I was trying to solve the problem: If A is a matrix and G be it's generalized inverse then G is reflexive if and only if rank (A)=rank (G)
- Prove that $o (a)=o (gag^ {-1})$ - Mathematics Stack Exchange
Your proof of the second part works perfectly, moreover, you can simply omit the reasoning $ (gag^ {-1})^2=\cdots=e$ since this is exactly what you've done in part 1
- Prove the centralizer of an element in group $G$ is a subgroup of $G$
We have a group $G$ where $a$ is an element of $G$ Then we have a set $Z (a) = \ {g\in G : ga = ag\}$ called the centralizer of $a$ If I have an $x\in Z (a)$, how
- group theory - Exercise 6. 6. 3 Weibel--Induced conjugation action . . .
This is an exercise in Weibel quot;Homological Algebra quot;, chapter 6 on group cohomology For reference, this is on Page 183 So the question was asking us to
- Let $a \in G$. Show that for any $g \in G$, $gC (a)g^ {-1} = C (gag . . .
Try checking if the element $ghg^ {-1}$ you thought of is in $C (gag^ {-1})$ and then vice versa
- abstract algebra - $gAg^ {-1} \subset A$ implies $gAg^ {-1} = A . . .
I am trying to prove that $gAg^ {-1} \subset A$ implies $gAg^ {-1} = A$, where A is a subset of some group G, and g is a group element of G This is stated without proof in Dummit and Foote
- Conjugacy Classes of the Quaternion Group $Q$
Disclaimer: This is not exactly an explanation, but a relevant attempt at understanding conjugates and conjugate classes
- Proving that $gHg^ {-1}$ is a subgroup of $G$
$1) $$ (gag^ {-1})^ {-1}=g^ {-1^ {-1}}a^ {-1}g^ {-1}=ga^ {-1}g^ {-1}$ $2)$ $ ga (g^ {-1}g)bg^ {-1}=g (ab)g^ {-1}$ I'm stuck at this point, Is it correct so far? is
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