On Thu, Nov 6, 2008 at 10:09 PM, henrik johansson <[EMAIL PROTECTED]> wrote:
> Hi,
>
>>
>> Indeed. Could you please prepare a patch? We'll merge it.
>>
>> Right. That's why we should allow the user to pass his own simplifying
>> functions. I think there will always be cases when simplify cannot do
>> it, so that when the user can pass it's own zero finder, he can fix
>> that easily. And let's report all failing cases as bugs to simplify.
>> We'll then judge on case by case basis if simplify should handle it or
>> not and how it should be approached.
>
>
> Here is a patch with an optional zero finder function argument in the inv
> method plus a note about the pivoting problem in the docstring. What do you
> think?

Very nice patch, thanks! It's in:

http://hg.sympy.org/sympy/rev/5fc85c34d2ae

Welcome to our team:

http://hg.sympy.org/sympy/rev/dbb9f31ff099


> And I will add issues for the cases where simplify fails to detect a zero
> that I found so far.

Excellent, thanks a lot!

Ondrej

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