Cyclonormal subgroup

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This article defines a subgroup property related to (or which arises in the context of): geometric group theory
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This article is about a definition in group theory that is standard among the group theory community (or sub-community that dabbles in such things) but is not very basic or common for people outside.
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This is an opposite of normality


A subgroup H of a group G is termed cyclonormal if for any g \in G \setminus H, the intersection H \cap gHg^{-1} is either the trivial group, or a cyclic subgroup.

Relation with other properties

Stronger properties



This subgroup property is transitive: a subgroup with this property in a subgroup with this property, also has this property in the whole group.
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This subgroup property is trim -- it is both trivially true (true for the trivial subgroup) and identity-true (true for a group as a subgroup of itself).
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YES: This subgroup property is intersection-closed: an arbitrary (nonempty) intersection of subgroups with this property, also has this property.
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