![]() | This is a rough draft of a proposed article on
generalized dihedral groups. Most of this content currently appears in the main
dihedral groups article. |
In mathematics, the generalized dihedral group Dih(H) associated to an abelian group H is the semidirect product of H and a cyclic group of order 2, the latter acting on the former by negation.
Elements of Dih(H) can be written as pairs (h, ε), where h ∈ H and ε = ±1, with the following rule for multiplication:
Note that each element of the form (h, –1) is its own inverse.
![]() | This is a rough draft of a proposed article on
generalized dihedral groups. Most of this content currently appears in the main
dihedral groups article. |
In mathematics, the generalized dihedral group Dih(H) associated to an abelian group H is the semidirect product of H and a cyclic group of order 2, the latter acting on the former by negation.
Elements of Dih(H) can be written as pairs (h, ε), where h ∈ H and ε = ±1, with the following rule for multiplication:
Note that each element of the form (h, –1) is its own inverse.