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EV33
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Homework Statement
G is a group. H is a subgroup.
lHl= order of H
lGl=order of G
[G]=Number of cosets
Counting Formula
lGl = lHl [G]
I have a question of clarification about this formula. My book says that [G]=number of cosets.
The problem is that at this point in my book they haven't defined right cosests yet so I wasn't sure if
[G]= The sum of the rights cosests and left cosets?
or
[G]= Just the left cosets?
Thank you.