Dear Kashyap, On Sun, Mar 29, 2015 at 11:53:15AM +0530, Dr. Kashyap Rajeevsarathy wrote: > Dear Forum, > > There seems to be some problem factoring rational polynomials using ALNUTH. > Please glance through the following examples and let me know if I am doing > something wrong, of if there is a problem with the package installation:
Do you have PARI/GP installed on your machine? (this probably will be not easy, if at all possible, on a Windows machine, but easy to install on Linux or OSX) PARI/GP is an external dependency for this package, as you can see from its installation instructions. Best, Dmitrii > > > > > > > > > *1) gap> x := Indeterminate(Rationals,"x");;gap> pol := x^2-3;x^2-3gap> L > := FieldByPolynomial(x^2-3);<algebraic extension over the Rationals of > degree 2>gap> y := Indeterminate( L, "y" );;gap> > FactorsPolynomialAlgExt(L,pol);* > > > > > > > > *Error, AL_EXECUTABLE, the executable for PARI/GP, has to be set called > fromProcessPariGP( Concatenation( input ), "polyfactors.gp > <http://polyfactors.gp>" ) called fromPolynomialFactorsDescriptionPari( H, > coeffs ) called fromFactorsPolynomialPari( AlgExtEmbeddedPol( H, poly ) ) > called from<function "FactorsPolynomialAlgExt">( <arguments> )called from > read-eval loop at line 5 of *stdin*you can 'quit;' to quit to outer loop, > oryou can 'return;' to continue* > > > > > > > > > > > > > > > > > > *2) gap> SplittingField(pol);<algebraic extension over the Rationals of > degree 2>gap> x := Indeterminate(Rationals,"x"); xgap> pol := x^2 - > 3;x^2-3gap> L := SplittingField(pol);<algebraic extension over the > Rationals of degree 2>gap> FactorsPolynomialAlgExt(L,pol);Error, > AL_EXECUTABLE, the executable for PARI/GP, has to be set called from > ProcessPariGP( Concatenation( input ), "polyfactors.gp > <http://polyfactors.gp>" ) called fromPolynomialFactorsDescriptionPari( H, > coeffs ) called fromFactorsPolynomialPari( AlgExtEmbeddedPol( H, poly ) ) > called from<function "FactorsPolynomialAlgExt">( <arguments> )called from > read-eval loop at line 9 of *stdin*you can 'quit;' to quit to outer loop, > oryou can 'return;' to continue* > > Sincerely, > Kashyap > -- > Kashyap Rajeevsarathy > Assistant Professor, > Indian Institute of Science Education and Research (IISER) Bhopal, > Indore By-pass Road, > Bhauri, Bhopal - 462066, > Madhya Pradesh, India. > Phone: +91-755-669-2364 > Website: https://home.iiserb.ac.in/~kashyap > _______________________________________________ > Forum mailing list > Forum@mail.gap-system.org > http://mail.gap-system.org/mailman/listinfo/forum _______________________________________________ Forum mailing list Forum@mail.gap-system.org http://mail.gap-system.org/mailman/listinfo/forum
