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Complex == Complex -- Compare two complexes.

Description

Checks whether C1 and C2 are equal.

Uses the facets of C1 and C2 (as in many examples the Stanley-Reisner ideal cannot be computed as it is too big to write down).

i1 : R=QQ[x_0..x_4];
 
i2 : C=simplex R;
 
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 : dbC=dualize bC

o4 = 0: v  v  v  v  v  
         0  1  2  3  4

o4 : co-complex of dim 0 embedded in dim 4 (printing facets)
     equidimensional, simplicial, F-vector {0, 5, 10, 10, 5, 1}, Euler = 1
 
i5 : bC==dualize dbC

o5 = true

See also

Ways to use this method:

The source of this document is in /__w/M2/M2/macaulay2-1.26.05+ds/M2/Macaulay2/packages/SRdeformations.m2:5640:0.