(where the set of all permutations which send 1 → 1)
How could i possibly determine the identity (and consequently the inverse) of the above?
Uuh?? First you have ...a group of matrices and a subgroup of this group.
And then you write something about permutations which send 1 to 1, and you ask about the identity and inverse "of the above": what "above"?...What is going on??
Uuh?? First you have ...a group of matrices and a subgroup of this group.
And then you write something about permutations which send 1 to 1, and you ask about the identity and inverse "of the above": what "above"?...What is going on??
Tonio
Sorry for the very badly worded question!
What i meant was we have and i have to determine whether or not H is a subgroup of G.
I've determined H is closed - now i have to find out whether or not H has an identity and an inverse. Neither or which i can find.