|Bill Allombert on Sun, 14 Sep 2003 12:10:22 +0200|
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Hello Pari-Dev, ginv(Q) has a strange behaviour: If Q is real, it reduce its output, but not if Q is imaginary. Also qfbpowraw(Q,-1) is implemented as ginv(Q) which is not correct if Q is real, because of the above. It seems that PARI * and ^ operators allow operation on quadratic forms but reduce them. I would personnaly prefer it does not reduce them. Also l*Qfb(a,b,c)=Qfb(l*a,l*b,l*c) could be supported. Lastly, is it possible to get the SL2 matrix involved in the equivalence between two forms ? (I have written a GP script for that effect, but...) Cheers, Bill.