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arxiv: 1506.08969 · v1 · pith:UFPGOZQ6new · submitted 2015-06-30 · 🧮 math.GR · math.GN· math.LO

Cardinal invariants distinguishing permutation groups

classification 🧮 math.GR math.GNmath.LO
keywords kappagrouplambdacardinalgroupsinvariantspermutationsprove
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We prove that for infinite cardinals $\kappa<\lambda$ the alternating group $Alt(\lambda)$ (of even permutations) of $\lambda$ is not embeddable into the symmetric group $Sym(\kappa)$ (of all permutations) of $\kappa$. To prove this fact we introduce and study several monotone cardinal group invariants which take value $\kappa$ on the groups $Alt(\kappa)$ and $Sym(\kappa)$.

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