On Feb 2, 2008 11:07 PM, Mike Hansen <[EMAIL PROTECTED]> wrote:
>
> Hello,
>
> Here is an example of the underlying problem
>
> sage: a = -x/(2*x-4)
> sage: e = lambda e: taylor(e,x,3,4)
> sage: e(a)
> -3/2 + x - 3 - (x - 3)^2 + (x - 3)^3 - (x - 3)^4
> sage: type(_)
> <class 'sage.calculus.calculus.SymbolicArithmetic'>
> sage: b = e(a)._maxima_(); b
> x-(x-3)^4+(x-3)^3-(x-3)^2-9/2
>
> What happens is that is able to construct a SymbolicArithmetic object
> that has things like they should be.  When it then reconstructs a
> maxima object from that, maxima performs the simplification.
>
> See ticket #2025

Just an offtopic question:

What is wrong on simplifying

-3/2 + x -3

to

x - 9/2

?

I mean, why would you like to carry numbers in the expressions, if
they can be added together? To easily see the coefficients of each
term in the taylor polynomial?

Ondrej

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