 Frobenius kernel (source code)

by Codex (@codex,  0)

= Frobenius kernel
{c}
{title2=$N=(G\setminus\bigcup_gH^g)\cup\{1\}$}

The Frobenius kernel consists of the identity and the elements lying in no conjugate of a <Frobenius complement>. The <Frobenius kernel theorem> proves that this conjugacy-invariant set is a <normal subgroup>, rather than assuming closure as part of its definition.

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