> > ---------- Forwarded message ---------- > From: Alan <[email protected]> > Date: May 26, 11:44 pm > Subject: Solving equations involving exp, Maxima > To: sage-devel > > Hello, > I have 2 questions: > > 1. Why do the following equations give different answers? > sage: solve([exp(x)==exp(0)],x) > [x == 0] > sage: solve([exp(x)==exp(-x)],x) > [x == I*pi, x == 0] > sage: solve([exp(x+1)==exp(-x+1)],x) > [e^(x + 1) == e^(-x + 1)] >
The first two ask different things. For the last one, I'm not sure why it's not giving the same answer as the second equation. > 2. Is there any way to make 'solve' recognize "obvious" solutions. For > example, > sage: solve([x==exp(-x+1)],x) > [x == e^(-x + 1)] > It probably should, though find_root(x-exp(1-x),-100,100) works. That may not be good enough for your needs, and it seems like it probably shouldn't be necessary. Zach -- 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
