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user160110
  • Member for 8 years, 9 months
  • Last seen more than 1 year ago
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An easy proof that $S(n)$ does not embed into $A(n+1)$?
I am getting that $\sigma$ commutes with $2^{k-1}k!\frac{(n+1-2k)!}{2}$ elements. How did you arrive at that number?
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