interiorLatticePoints -- computes the lattice points in the relative interior of a polytope

i1 : P = crossPolytope(3,2)

o1 = {ambient dimension => 3           }
      dimension of lineality space => 0
      dimension of polyhedron => 3
      number of facets => 8
      number of rays => 0
      number of vertices => 6

o1 : Polyhedron

i2 : interiorLatticePoints P

o2 = {| -1 |, | 0  |, | 0  |, 0, | 0 |, | 0 |, | 1 |}
      | 0  |  | -1 |  | 0  |     | 0 |  | 1 |  | 0 |
      | 0  |  | 0  |  | -1 |     | 1 |  | 0 |  | 0 |

o2 : List

i3 : Q = cyclicPolytope(2,4)

o3 = {ambient dimension => 2           }
      dimension of lineality space => 0
      dimension of polyhedron => 2
      number of facets => 4
      number of rays => 0
      number of vertices => 4

o3 : Polyhedron

i4 : interiorLatticePoints Q

o4 = {| 1 |, | 2 |}
      | 2 |  | 5 |

o4 : List