Hi Kalevi,
Thank you so much! Now I have a good starting point. I really
appreciate it.
Sincerely,
Yiming
On Thu, Jun 2, 2016 at 3:27 AM, Kalevi Suominen <[email protected]> wrote:
>
>
> On Thursday, June 2, 2016 at 8:11:26 AM UTC+3, Yiming Yang wrote:
>>
>> Hello All,
>>
>> My question may be naive, as I'm new to Sympy. I tried to find how
>> Sympy defines parametric polynomials, i.e. polynomials with indeterminate
>> coefficients (K[U][X] with coefficients in K[U]), but could not figure it
>> out. I checked those domains defined in sympy.polys.domains, and thought
>> "CompositeDomain" might help, but I was confused by its usage. Could anyone
>> give an example of it to me, if it is the correct class I'm looking for?
>> Thank you!
>>
>>
>> Sincerely,
>> Yiming Yang
>>
>
> A simple way of defining such a polynomial ring is the following.
>
> >>> U, X = symbols('U, X')
> >>> R = ZZ[U][X]
> >>> R.gens
> (X,)
> >>> R.domain
> ZZ[U]
>
>
> Other rings can be used instead of ZZ.
>
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--
γνῶθι σεαυτόν.
--
Yiming Yang
Tel: +1-(505)720-2809
Office 342
Department of Computer Science
MSC01 1130
1 University of New Mexico
Albuquerque, NM 87131-0001
USA
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