In: Advanced Math
Consider the subgroup H={R0,R180} of D6. List the elements of the factor group D6/H.
Recall
, where < > denotes the group generated by. Note that we can
identify
, Thus the
group H becomes
.
Thus we need to find the group
. Note that
, and
, hence
. Note in
the group
,
, thus
,
,
,
. Hence the elements
,
,
,
will collapse in the group
. Hence the group
, where `bar' denotes going modulo H.
Now note that in the group we can identify .