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SRdeformations :: simplexRing(Face)

simplexRing(Face) -- The underlying polynomial ring of a face.

Synopsis

Description

The underlying polynomial ring of F.

i1 : R=QQ[x_0..x_4];
i2 : C=simplex R;
i3 : F=C.fc_2_0

o3 = x x x
      0 1 2

o3 : face with 3 vertices
i4 : simplexRing F

o4 = R

o4 : PolynomialRing
i5 : R.grading

o5 = | -1 -1 -1 -1 |
     | 1  0  0  0  |
     | 0  1  0  0  |
     | 0  0  1  0  |
     | 0  0  0  1  |

              5        4
o5 : Matrix ZZ  <--- ZZ