The dual cone of C in QQ^n is the cone in the dual ambient space (QQ^n)^*, given by {p in (QQ^n)^* | p*c >= 0 for all c in C}.
i1 : C = posHull matrix {{1,2},{2,1}}
o1 = {ambient dimension => 2 }
dimension of lineality space => 0
dimension of the cone => 2
number of facets => 2
number of rays => 2
o1 : Cone
i2 : Cv = dualCone C
o2 = {ambient dimension => 2 }
dimension of lineality space => 0
dimension of the cone => 2
number of facets => 2
number of rays => 2
o2 : Cone