I have the useful command:
EtaGroup(8).basis()[0].r(2)
which will return the first exponent in (eta_2)^-4 (eta_4)^12 (eta_8)^-8; namely -4. Similarly
EtaGroup(8).basis()[0].r(4)
will return 12 etc. I want to extract the scaling factors though. That is, I want to print 2 or 4 or 8 in the expression (eta_2)^-4 (eta_4)^12 (eta_8)^-8
How??
