i1 : P = intersection(matrix{{1,-1},{0,-1},{-1,-1},{0,1}}, matrix{{0},{-1},{0},{1}})
o1 = {ambient dimension => 2 }
dimension of lineality space => 0
dimension of polyhedron => 1
number of facets => 2
number of rays => 0
number of vertices => 2
o1 : Polyhedron
|
i2 : vertices P
o2 = | -1 1 |
| 1 1 |
2 2
o2 : Matrix QQ <--- QQ
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