Hi Robert,
On Sun, 11 Oct 2009 04:30:14 -0700 (PDT)
"ma...@mendelu.cz" <ma...@mendelu.cz> wrote:
> Hello all, is there in Sage a function which tests, if expression1
> depends on expression2 ?
> Something like Maxima's command freeof?
Symbolic expressions have methods named find, match, has.
<snip>
> sage: x=var('x')
> sage: freeof(x,x^2+3)
> False
> sage: freeof(x^2,x^2+3)
> False
> sage: freeof(x^6,x^2+3)
> True
sage: (x^2+3).has(x)
True
sage: (x^2+3).has(x^2)
True
sage: (x^2+3).has(x^6)
False
Does this work for you?
Cheers,
Burcin
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