Definition:Commutator/Group

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Definition

Let $\struct {G, \circ}$ be a group.

Let $g, h \in G$.


Definition 1

The commutator of $g$ and $h$ is the element of $G$ defined and denoted:

$\sqbrk {g, h} := g^{-1} \circ h^{-1} \circ g \circ h$


Definition 2

The commutator of $g$ and $h$ is the element $c$ of $G$ with the property:

$h \circ g \circ c := g \circ h$


Also see

  • Results about commutators of group elements can be found here.