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🏠
/
Mathematics
/
Group Theory
/
Coset
Coset
A set composed of all the products obtained by multiplying each element of a subgroup by a fixed element of the group. Cosets partition the group.
📜
The statement of the theorem
For a subgroup
H
⊆
G
H \subseteq G
H
⊆
G
and
g
∈
G
g \in G
g
∈
G
, the left coset is
g
H
=
{
g
h
:
h
∈
H
}
gH = \{gh : h \in H\}
g
H
=
{
g
h
:
h
∈
H
}
and the right coset is
H
g
=
{
h
g
:
h
∈
H
}
Hg = \{hg : h \in H\}
H
g
=
{
h
g
:
h
∈
H
}
.