On Sunday, May 17, 2015 at 12:43:59 PM UTC+5:30, Gaurav Dhingra wrote:
>
> >>> from sympy import Symbol, oo, simplify
> >>> x = Symbol('x', real=True)
> >>> simplify( x*oo )
> oo*x
>
> Do we use extended real number system(Affinely Extended Real Number
> System) in sympy ?
> If we do use them, then why not expressions like these "x*oo" evaluated
> to a Piecewise function like
> >>> Symbol('x', real=True)
> >>> simplify( x*oo )
> Piecewise( ( -oo, x< 0 ), ( oo, x > 0), (Nan, x==0 )) # i expect
> this to happen.
>
Edit: I have 2nd writing of x to 'real=True'
>
> Gaurav Dhingra
>
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