given a list of equality expressions, is there a way to remove all the members that can be inferred by others in the list so that the final list contains only independent expressions and they imply all the ones that were removed.
For example [x == 2, x^2 = 4] => [x == 2] ([x*x-y*y==0,x-y==0,x*x-y*y==0,2*x*y-2*y*y==0] => [-x + y == 0] I tried to use Grobner basis Q = PolynomialRing(QQ,[x,y,z ...]) result = (Q*input_list).groebner_basis() but it's not the right approach for this because [a*y - b == 0,a*r - a*x + b*q == 0,q*y + r - x == 0] => [a*y - b == 0, q*y + r - x == 0, -a*r + a*x - b*q == 0] even though a*r - a*x + b*q == 0 can be implied from the other two. Any suggestion ? Thanks, -- 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 URL: http://www.sagemath.org
