> #F=S.polynomials(); > s=S.solutions(); > > P= PolynomialRing(GF(2),16,"y0, y1, y2, y3, y4, y5, y6, y7, x0, x1, > x2, x3, x4, x5, x6, x7",order='lex'); > P.inject_variables(); > > p=S.polynomials([x0, x1, x2, x3, x4, x5, x6, x7],[y0, y1, y2, y3, y4, > y5, y6, y7], groebner=True);
Ah, got it: your list p is empty. This is because your S-Box just doesn't give rise polynomials of degree 2 (the default choice). Just choose a higher degree. cf. the documentation of "S.polynomials?" for details. Cheers, Martin -- name: Martin Albrecht _pgp: http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x8EF0DC99 _otr: 47F43D1A 5D68C36F 468BAEBA 640E8856 D7951CCF _www: http://www.informatik.uni-bremen.de/~malb _jab: martinralbre...@jabber.ccc.de --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
