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D.5.5.13 cleanunit
Procedure from library resbinomial.lib (see resbinomial_lib).
- Compute:
- We clean (or forget) the units in a monomial, given by "y" variables
- Return:
- The list defining the monomial ideal already cleaned
Example:
| | LIB "resbinomial.lib";
ring r = 0,(x(1),y(2),x(3),y(4)),dp;
list flag=identifyvar();
ideal J=x(1)^3*y(2)*x(3)^5*y(4)^8;
list L=data(J,1,4);
L[2][1][1]; // list of exponents of the monomial J
==> [1]:
==> 3
==> [2]:
==> 1
==> [3]:
==> 5
==> [4]:
==> 8
list M=cleanunit(L[2][1][1],4,flag);
M; // new list without units
==> [1]:
==> 3
==> [2]:
==> 0
==> [3]:
==> 5
==> [4]:
==> 0
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