Top network posts

• 12 If $N$ is a normal subgroup of a group $G$, and $M$ is a characteristic subgroup of $N$, then $M$ is a normal subgroup of G.
• 8 Historicity of Agamemnon
• 8 Solution to $x(128)x=(12365)(479)$ in $A_9$, the alternating group
• 6 Ei (egg in German) and eye; Auge (eye in German) and egg
• 6 Representation in $A_8$ of $D_4$ allows automorphism that switches 2 normal subgroups
• 5 Non unique factorization domains with prime factorizations with differing number of primes
• 5 $n\#$ (the $n$th primorial) seems very close to $e[(n-1)^n - n^{n-1}]$
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