Thanks!
On Jun 16, 9:30 pm, William Stein <wst...@gmail.com> wrote:
> On Tue, Jun 16, 2009 at 9:12 PM, Utpal Sarkar<doe...@gmail.com> wrote:
>
> > Hi,
>
> > It looks like locally defined symbolic variables are always global, in
> > particular they overwrite globally defined variables of the same name:
> > sage: d = 0
> > sage: def f():
> > ....: d = var('d')
> > ....: d = 1
> > ....:
> > sage: d
> > 0
> > sage: f()
> > sage: d
> > d
> > (I put the d = 1 in the function definition to show the difference in
> > behaviour)
>
> Use new_var:
>
> sage: d=0
> sage: def foo(n):
> ... d = sage.calculus.var.new_var('d')
> ... print d^n
> ...
> ...
> sage: foo(10)
> d^10
> sage: d
> 0
>
> Maybe var(global=False) should be an option?
>
> William
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