Asir - dp_ptozp dp_prim

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`dp_ptozp`, `dp_prim`

dp_ptozp(dpoly): :: Converts a distributed polynomial poly with rational coefficients into an integral distributed polynomial such that GCD of all its coefficients is 1.
dp_prim(dpoly): :: Converts a distributed polynomial poly with rational function coefficients into an integral distributed polynomial such that polynomial GCD of all its coefficients is 1.

return: distributed polynomial
dpoly: distributed polynomial

dp_ptozp() executes the same operation as ptozp() for a distributed polynomial. If the coefficients include polynomials, polynomial contents included in the coefficients are not removed.
dp_prim() removes polynomial contents.

[208] X=dp_ptod(3*(x-y)*(y-z)*(z-x),[x]);
(-3*y+3*z)*<<2>>+(3*y^2-3*z^2)*<<1>>+(-3*z*y^2+3*z^2*y)*<<0>>
[209] dp_ptozp(X);                       
(-y+z)*<<2>>+(y^2-z^2)*<<1>>+(-z*y^2+z^2*y)*<<0>>
[210] dp_prim(X);                        
(1)*<<2>>+(-y-z)*<<1>>+(z*y)*<<0>>

References: section ptozp.

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