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D.2.7.7 sparsepoly

Procedure from library random.lib (see random_lib).

Usage:
sparsepoly(u[,o,p,b]); u,o,p,b integers

Return:
poly having only terms in degree d, u<=d<=o, p percentage of the terms in degree d are 0, the remaining have random coefficients in [1,b), (defaults: o=u, p=75, b=30000)

Example:
 
LIB "random.lib";
ring r=0,(x,y,z),dp;
sparsepoly(5);"";
==> 24263xy4+24170x4z+21962x3yz+26642xy3z+5664xy2z2+17904xz4
==> 
sparsepoly(3,5,90,9);
==> 8x3z2+2y3z2+3xyz3+2xy3+yz3+xy2