-- -*- M2-comint -*- {* hash: 363480886 *} i1 : R=QQ[x_0..x_4] o1 = R o1 : PolynomialRing i2 : C=simplex R o2 = 4: x x x x x 0 1 2 3 4 o2 : complex of dim 4 embedded in dim 4 (printing facets) equidimensional, simplicial, F-vector {1, 5, 10, 10, 5, 1}, Euler = 0 i3 : bC=boundaryOfPolytope C o3 = 3: x x x x x x x x x x x x x x x x x x x x 0 1 2 3 0 1 2 4 0 1 3 4 0 2 3 4 1 2 3 4 o3 : complex of dim 3 embedded in dim 4 (printing facets) equidimensional, simplicial, F-vector {1, 5, 10, 10, 5, 0}, Euler = -1 i4 : F=bC.fc_2_0 o4 = x x x 0 1 2 o4 : face with 3 vertices i5 : complement F o5 = x x 3 4 o5 : face with 2 vertices i6 :