Say I have a expression f containing symbols a, b, c, a**2, b**2, and c**2 and I wish to automate imposing the constraint a**2+b**2+c**2 = 1. But a,b, and c and their squares are hidden (were generated by other manipulations) so all I have are f and xsq (xsq = a**2+b**2+c**2). How do I extract the first square from xsq so that I can:
new_xsq = xsq-a**2-1 and then substitute new_xsq into f eliminating a**2 from f (I actually don't care whether I eliminate a**2 or b**2 or c**2). --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "sympy" group. To post to this group, send email to sympy@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sympy?hl=en -~----------~----~----~----~------~----~------~--~---
