ASKSAGE: Sage Q&A Forum - RSS feedhttps://ask.sagemath.org/questions/Q&A Forum for SageenCopyright Sage, 2010. Some rights reserved under creative commons license.Tue, 08 Oct 2013 12:33:02 +0200Difference Between Constants and Variableshttps://ask.sagemath.org/question/10583/difference-between-constants-and-variables/Hello all. I'm working with variational calculus in sage and working with
complicate expression `F` of a lot of variables declared with `var`.
I used `var` to declare both variables and constants. My problem is that I have
to know the exact number of variables which some generic expression depends. By
this reason the member function `variables` of an expression does not work, i.e.,
it returs both variables and constants because them was declared with `var` function.
I'm wondering if there is some type of variable in sage that can act as a variable to construct an expression and don't be returned by the `variables` member function.Rafael RojasTue, 08 Oct 2013 12:33:02 +0200https://ask.sagemath.org/question/10583/