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22h
comment When does normal maximal subgroup have prime index?
@NickyHekster he says $N$ is a maximal subgroup and is also normal, so t suffices to find a subgroup between $G$ and $N$ to contradict the maximality.
22h
revised Structural Induction vs Normal (Mathematical) Induction
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1d
answered When does normal maximal subgroup have prime index?
1d
comment When does normal maximal subgroup have prime index?
exactly, I hope this helped.
1d
comment Find the greatest common divisor of pairs of polynomials
use the euclidean algorithm.
1d
comment Wolfram|Alpha refuses to find the inverse of a large 6x6 matrix.
" I have no idea why the technology I so desperately rely on is failing me now." relying on wolframalpha is for noobs.
1d
comment When does normal maximal subgroup have prime index?
have you tried using the correspondence theorem ? (sometimes called 4th iso theorem).
1d
revised Show that a ring $R$ is a division ring if and only if, for each nonzero $a\in R$, there is a unique element $b\in R$ such that $aba = a$.
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1d
answered Show that a ring $R$ is a division ring if and only if, for each nonzero $a\in R$, there is a unique element $b\in R$ such that $aba = a$.
1d
comment Prove that even $n$ can be partitioned to $\frac n2$ edges
There is no $\frac{n}{2}$ becuase I swapped $n$ with $2n$.
1d
comment Show that a ring $R$ is a division ring if and only if, for each nonzero $a\in R$, there is a unique element $b\in R$ such that $aba = a$.
your solution has some flaws, like for example, why does such an $r$ exist?
1d
comment Show that a ring $R$ is a division ring if and only if, for each nonzero $a\in R$, there is a unique element $b\in R$ such that $aba = a$.
this was totally in my homework last year, let me see if I an remember
1d
comment Prove that even $n$ can be partitioned to $\frac n2$ edges
What part is causing you trouble?
1d
answered Prove that even $n$ can be partitioned to $\frac n2$ edges
1d
comment Let $G$ be a group of order $35$. Prove that $G \cong C_5 \times C_7$.
if a subgroup is the only subgroup of its order then it is normal (because $gHg^{-1}$) is a subgroup with the same order as $H$)
1d
revised Let $G$ be a group of order $35$. Prove that $G \cong C_5 \times C_7$.
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1d
answered Let $G$ be a group of order $35$. Prove that $G \cong C_5 \times C_7$.
1d
comment How do I memorize mathematical proofs?
Regarding the title: don't.
1d
comment Graph Theory Proof of Website Clicks
the website you are looking for is the website with the most links, this website can reach every other website with at most two clicks
1d
revised Graph Theory Proof of Website Clicks
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