Singularhttp://www.singular.uni-kl.de/forum/ solving systems of polynomials with parameters(symbols)http://www.singular.uni-kl.de/forum/viewtopic.php?f=10&t=1500 Page 1 of 1

 Author: kamlesh [ Mon Jun 12, 2006 11:58 pm ] Post subject: solving systems of polynomials with parameters(symbols) Hello , I have a system of polynomial equations in variables as well as in parameters . I want to solve it in variables ( in terms of a parameters and a chosen variable ) . Tried using the solve command after computing the grobner basis . It says the system has parameters and refused to solve it . Whereas the same problem was solved using mathematica .I need to do it using singular , can somebody tell me where am I wrong ?// The actual problem f1 = D + 2AC + A^2 + 2B - c = 0 ; f2 = A^2 + 2BD + 2ABC + B^2 - d = 0 ; f3 = B^2D - e =0 ;f4 = AD-BC = 0;with B,C,D,A as variables in lex ordr and c,d,e are parameters .mathematica gives a 6th deg polynomial in B with coeffs ( coming from the parameters ) , and other var expressed in terms of B and parameters . // Can anybody suggest other useful topics to look into for dealing with similar problems ?kamlesh

 Author: kamlesh [ Tue Jun 20, 2006 6:11 pm ] Post subject: hmmm yeah was finally able to extract the required information . The trick is to find the groebner basis with various ordering of the variables ( all in lp ) and then use the necessary polynomials and get the answerkamlesh

 Author: momo [ Tue Dec 17, 2013 11:13 am ] Post subject: Re: write in code kamlesh wrote:hmmm yeah was finally able to extract the required information . The trick is to find the groebner basis with various ordering of the variables ( all in lp ) and then use the necessary polynomials and get the answerkamleshYeah, I have the same problem.I tried it, but not enough memory.I define such thing:ring r=(0,c,d,e),(A,B,C,D),lp;ideal i=f1,f2,f3,f4;groebner (i);will it work like that?momo

 Page 1 of 1 All times are UTC + 1 hour [ DST ] Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Grouphttp://www.phpbb.com/