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Reference documentation for older polymake versions: release 3.4, release 3.3, release 3.2

BigObject QuotientSpace

from application polytope

A topological quotient space obtained from a Polytope by identifying faces. This object will sit inside the polytope.

Basic properties

Properties defining a quotient space.


IDENTIFICATION_ACTION

The group encoding the quotient space. The faces of the space are the orbits of the faces of the polytope under the group.

Type:

Combinatorics

These properties capture combinatorial information of the object. Combinatorial properties only depend on combinatorial data of the object like, e.g., the face lattice.


COCIRCUIT_EQUATIONS

a SparseMatrix whose rows are the sum of all cocircuit equations corresponding to a fixed symmetry class of interior ridge

Type:

DIM

The dimension of the quotient space, defined to be the dimension of the polytope.

Type:
Int

FACES

The faces of the quotient space, ordered by dimension. One representative of each orbit class is kept.

Type:

FACE_ORBITS

The orbits of faces of the quotient space, ordered by dimension.

Type:

F_VECTOR

An array that tells how many faces of each dimension there are

Type:

N_SIMPLICES

The simplices made from points of the quotient space (also internal simplices, not just faces)

Type:

REPRESENTATIVE_INTERIOR_RIDGE_SIMPLICES

The (d-1)-dimensional simplices in the interior.

Type:

REPRESENTATIVE_MAX_BOUNDARY_SIMPLICES

The boundary (d-1)-dimensional simplices of a cone of combinatorial dimension d

Type:

REPRESENTATIVE_MAX_INTERIOR_SIMPLICES

The interior d-dimensional simplices of a cone of combinatorial dimension d

Type:

SIMPLEXITY_LOWER_BOUND

A lower bound for the number of simplices needed to triangulate the quotient space

Type:
Int

SIMPLICES

All simplices in the quotient space

Type:

SIMPLICIAL_COMPLEX

A simplicial complex obtained by two stellar subdivisions of the defining polytope.

Type:

SYMMETRY_GROUP

The symmetry group induced by the symmetry group of the polytope on the FACES of the quotient space

Type:

  • documentation/latest/polytope/quotientspace.txt
  • Last modified: 2019/08/13 10:31
  • (external edit)