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[sagesupport] Multivariate polynomials in Sage Nathann Cohen Wed Aug 26 12:03:06 2009
Hello everybody !!! I am trying to make Linear Programming in Sage a bit easier, and I looked into Sage's features concerning multivariate polynomials... I first wanted indexed variables, and it seems pretty easy to build : y = RR['y0, y1, y2'].gens() and then y[0]*y[1] But I have two questions now : * Could it be possible to define variables indexed two times ? Something like y[0][1]*y[2][3] ? Could it even be possible to define "dictionary" variables ( I mean a dictionary of variables ) y["g"]*y["h"] * Besides, when I have on one hand a variable y : y = RR['y0, y1, y2'].gens() And a variable x : x = RR['x0, x1, x2'].gens() How can I easily multiply x[0]*y[2] or add them ? My problem is that I would like to easily ( from the syntaxical point of view ) be able to define linear functions on formal variables, under the constraints that I never know how many variables I will have to use in the end ( I prefer not having to declare them at the beginning ), and also that I may need a variable x[10][30] without needing a variable x[2][6] ( it would be very handy for me to be able to declare "dictionary" variables ) I know I may ask a lot, though.... :) Thank you for your help !!!! Nathann ~~~~~~~~~ To post to this group, send email to [EMAIL PROTECTED] To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sagesupport URLs: http://www.sagemath.org ~~~~~~~~~
 [sagesupport] Multivariate polynomials in Sage Nathann Cohen 2009/08/26 <=
 [sagesupport] Re: Multivariate polynomials in Sage Simon King 2009/08/26
 [sagesupport] Re: Multivariate polynomials in Sage Nathann Cohen 2009/08/26
 [sagesupport] Re: Multivariate polynomials in Sage Simon King 2009/08/26
 [sagesupport] Re: Multivariate polynomials in Sage Martin Albrecht 2009/08/26
 [sagesupport] Re: Multivariate polynomials in Sage Simon King 2009/08/26
 [sagesupport] Re: Multivariate polynomials in Sage Nathann Cohen 2009/08/27