Op maandag 4 maart 2013 22:36:33 UTC+1 schreef luisfe het volgende:
>
> Hi,
>
> Can any one enlight me about what is going on here?
>
> {{{
> sage: t=(1,2,3)
> sage: type(t)
> tuple
> sage: len(t)
> 3
> sage: len(t)=4
> sage: t
> t
> sage: type(t)
> sage.symbolic.expression.Expression
> }}}
>
It goes on with:
{{{
sage: len
t |--> 4
}}}
In other words, you did a function definition for the function `len`, just
like
{{{
sage: f(x) = x^2
sage: f
x | --> x^2
}}}
Best, Timo
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