411 REFERENCE · Wikibooks
Abstract Algebra/Group Theory/Subgroup/Coset/Definition of a Coset
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frame|h*g is in right coset Hg if h is in subgroup H of G and g is in group G.
Let g be a fixed element of Group G.
Let H be a subgroup of G.
Left Coset of H by g is gH.
Right Coset of H by g is Hg.
Notice that such cosets are not necessarily subgroups of G.