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D.5.5.18 convertdata

Procedure from library resbinomial.lib (see resbinomial_lib).

Usage:
convertdata(C,L,n,flaglist);
C, L, flaglist lists, n integer

Compute:
Compute the ideal corresponding to the given lists C,L

Return:
an ideal whose coefficients are given by C, exponents given by L

Example:
 
LIB "resbinomial.lib";
ring r = 0,(x(1..4),y(5)),dp;
list M=identifyvar();
ideal J=x(1)^2*y(5)^2-x(2)^2*x(3)^2,6*x(4)^2;
list L=data(J,2,5);
L[1]; // Coefficients
==> [1]:
==>    [1]:
==> -1
==>    [2]:
==> 1
==> [2]:
==>    [1]:
==> 6
L[2]; // Exponents
==> [1]:
==>    [1]:
==>       [1]:
==>          0
==>       [2]:
==>          2
==>       [3]:
==>          2
==>       [4]:
==>          0
==>       [5]:
==>          0
==>    [2]:
==>       [1]:
==>          2
==>       [2]:
==>          0
==>       [3]:
==>          0
==>       [4]:
==>          0
==>       [5]:
==>          2
==> [2]:
==>    [1]:
==>       [1]:
==>          0
==>       [2]:
==>          0
==>       [3]:
==>          0
==>       [4]:
==>          2
==>       [5]:
==>          0
ideal J2=convertdata(L[1],L[2],5,M);
J2;
==> J2[1]=-x(2)^2*x(3)^2+x(1)^2*y(5)^2
==> J2[2]=6*x(4)^2