(1) How does one define a field of rational functions in several variables? QQ[x,y] gives me the ring of polynomials in x & y over QQ, but 2*x/y is not in this ring.
(2) I want to be able to check if an object is in this field, and have the work-around or forcing the addition of expressions (like 1/x + 1/ y) , and then determining if both numerator and denominator of (x+y)/ (x*y) are in QQ[x,y]. But I don't know how to force the addition. Is this in the tutorial - http://www.sagemath.org/doc/tutorial/ ? -- To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
