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D.14.4.4 boolean_poly

Procedure from library polybori.lib (see polybori_lib).

Usage:
boolean_poly(ps[, dir, rb]); ps polynomial, dir integer zero or one, rb boolean ring

Return:
default: polynomial ps in the representation of the boolean ring rb==boolean_poly_ring(basering); optional input: boolean ring rb

Note:
via the optional input dir, one can choose the computation method (either direct[dir==0] or recursive[dir==1]). default: recursive

Example:
 
LIB "polybori.lib";
ring r=0,x(1..5),Dp;
poly f=x(2)*(x(3)-x(1))+x(4)*x(5);
bring rb=r;
boolean_poly(f);
==> x(1)*x(2) + x(2)*x(3) + x(4)*x(5)
boolean_poly(f,0);
==> x(1)*x(2) + x(2)*x(3) + x(4)*x(5)
boolean_poly(f,0,boolean_poly_ring(r));
==> x(1)*x(2) + x(2)*x(3) + x(4)*x(5)
boolean_poly(f,0,rb);
==> x(1)*x(2) + x(2)*x(3) + x(4)*x(5)
poly g=0;
boolean_poly(g);
==> 0
poly g=1;
==> // ** redefining g (poly g=1;)
boolean_poly(g);
==> 1
See also: boolean_ideal; boolean_std.