On Tue, Apr 6, 2010 at 3:54 PM, Stefan Neculai <[email protected]> wrote: > One possible method for solving inequalities like q<0 ( where q is a > continuous function ) would be: > - find the roots of q=0 > - compute q(x) where x is a value between two consecutive roots (a,b) > - on (a,b) interval, q will have the signature of q(x) > Example: > x^2-x<0 > q(x) = x^2 - x = 0 > roots: x = 0, x = 1 > on (-inf,0) we have: q(-1)=2 so q > 0 on (-inf,0) > on (0,1) we have: q(1/2)=-1/4 so q < 0 on (0,1) > on (1,inf) we have: q(2)=2 so q > 0 on (1,inf) > What do you think about this?
Looks good. Here are lots of other examples that you might consider: http://reference.wolfram.com/mathematica/tutorial/Inequalities-ManipulatingEquationsAndInequalities.html Also, unless you have some ideas for a better interface, I would do the interface similar to what Mathematica has. Ondrej -- You received this message because you are subscribed to the Google Groups "sympy" group. 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/sympy?hl=en.
