linealitySpace(T)
This function computes the lineality space of the fan associated to the tropical cycle T. The generators of the lineality space are the columns of the output matrix
i1 : QQ[x,y,z];
i2 : I=ideal(x-y); o2 : Ideal of QQ[x..z]
i3 : T=tropicalVariety I;
i4 : L=linealitySpace T o4 = | 1 0 | | 1 0 | | 0 1 | 3 2 o4 : Matrix ZZ <-- ZZ