On May 19, 2008, at 7:08 PM, Dan Pillone wrote: > > Hi, > > Yes, I know that for lots of negative real numbers x^x is not defined, > but for some values of x, such as x=-1 or x=-1/3 there is a real > number answer and I don't see anything plotted. Why isn't anythng > plotted at those discrete set of values?
They were less than 1 pixel wide :). On a more serious note, what happens is it picks a list of values between your two enpoints, evaluates the function at those points, and connects the dots. The chance that one of the chosen points is such that x^x is defined is extraordinarily slim (especially since the values are represented in floating point). - Robert > > Dan > > On May 16, 5:37 pm, Robert Bradshaw <[EMAIL PROTECTED]> > wrote: > >> >> This is because x^x is not real-valued for negative x (except at a >> discrete set of values). Unlike the cube root case, one can't even >> pick a branch that makes it real-valued. >> >> - Robert > > --~--~---------~--~----~------------~-------~--~----~ 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 URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
