Ralf Hemmecke <[email protected]> writes:

> Hi Martin
>
>> D2(f: POLY INT): POLY INT == z2*D(f, z2) + 1/2*z1^4*D(f, z2, 2) + 
>> z1^3*D(D(f, z2), z1) + 1/2*z1^2*D(f, z1, 2) + z1^3*D(f, z2)+z1^2*D(f,z1)+z2*f
>
> Do you expect that to work?

either that or (perhaps better) complain about a missing coercion.

> I agree that it is bad that FriCAS gets it wrong, but why haven't you
> started with FRAC(INT) from the beginning or even use a more specific
> type?

It was simply a mistake.  A curious one though, since the first 17
numbers agree (and they are already quite big).  I was lucky to discover
it, sloane stops at value 16 :-)


Martin

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