[sage-support] Re: Define polynomial rings of given variables
R=BooleanPolynomialRing(100,['x'+str(i) for i in [1..100]]) R.inject_variables()# if you don't really need the identifiers in Python's namespace, better skip this On Dec 5, 6:18 am, Subhadeep Banik monsieurlel...@gmail.com wrote: If I have a boolean expression of a certain number of variables, how do I define a polynomial ring with them.. For example, let (x0,x1,x2,x3,x4,x5,x6,x7) be a set of variables, and I have an expression S = x0 + x1*x3 + x7 I need to define the polynomial ring R.x0,x1,x3,x7=BooleanPolynomialRing(4) This exercise is fine, if the number of variables is small , but what is the solution if the number of variables is large. Thank You Subhadeep Banik Senior Research Fellow Applied Statistics Unit Indian Statistical Institute Kolkata Phone : 91 9433037829 (M) 91 33 - 25741829 (H) -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: Define polynomial rings of given variables
On Dec 5, 3:18 pm, Subhadeep Banik monsieurlel...@gmail.com wrote: If I have a boolean expression of a certain number of variables, how do I define a polynomial ring with them.. For example, let (x0,x1,x2,x3,x4,x5,x6,x7) be a set of variables, and I have an expression S = x0 + x1*x3 + x7 I need to define the polynomial ring R.x0,x1,x3,x7=BooleanPolynomialRing(4) This exercise is fine, if the number of variables is small , but what is the solution if the number of variables is large. Thank You Subhadeep Banik If you need a polynomial ring with selected variables then you can try for example R=PolynomialRing(GF(2),'x',2^8) x=R.gens() S=x[253]+x[254]*x[255] xx=S.variables() l=len(xx) P=BooleanPolynomialRing(l,map(str,xx)) Andrzej Chrzeszczyk Senior Research Fellow Applied Statistics Unit Indian Statistical Institute Kolkata Phone : 91 9433037829 (M) 91 33 - 25741829 (H) -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
