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Integral polytope information


Cube Cuboctahedron Octahedron Truncated
octahedron
(±1, ±1, ±1) (0, ±1, ±1) (0, 0, ±1) (0, ±1, ±2)
Four integral polytopes in three dimensions

In geometry and polyhedral combinatorics, an integral polytope is a convex polytope whose vertices all have integer Cartesian coordinates.[1] That is, it is a polytope that equals the convex hull of its integer points.[2] Integral polytopes are also called lattice polytopes or Z-polytopes. The special cases of two- and three-dimensional integral polytopes may be called polygons or polyhedra instead of polytopes, respectively.

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Integral polytope

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combinatorics, an integral polytope is a convex polytope whose vertices all have integer Cartesian coordinates. That is, it is a polytope that equals the...

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Polytope

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In elementary geometry, a polytope is a geometric object with flat sides (faces). Polytopes are the generalization of three-dimensional polyhedra to any...

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Convex polytope

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A convex polytope is a special case of a polytope, having the additional property that it is also a convex set contained in the n {\displaystyle n} -dimensional...

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Ehrhart polynomial

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mathematics, an integral polytope has an associated Ehrhart polynomial that encodes the relationship between the volume of a polytope and the number of...

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Newton polytope

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In mathematics, the Newton polytope is an integral polytope associated with a multivariate polynomial. It can be used to analyze the polynomial's behavior...

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Stable matching polytope

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economics, and computer science, the stable matching polytope or stable marriage polytope is a convex polytope derived from the solutions to an instance of the...

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Regular polytope

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In mathematics, a regular polytope is a polytope whose symmetry group acts transitively on its flags, thus giving it the highest degree of symmetry. In...

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Octahedron

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convex polytopes, the octahedron can be dissected into an integral number of disjoint orthoschemes, all of the same shape characteristic of the polytope. A...

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Birkhoff polytope

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coordinates are zero or one, the Birkhoff polytope is an integral polytope. The edges of the Birkhoff polytope correspond to pairs of permutations differing...

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4 21 polytope

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this polytope is sometimes referred to as the E8 root polytope. The vertices of this polytope can also be obtained by taking the 240 integral octonions...

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Linear programming

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decomposition property and total dual integrality. Other specific well-known integral LPs include the matching polytope, lattice polyhedra, submodular flow...

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Order polytope

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mathematics, the order polytope of a finite partially ordered set is a convex polytope defined from the set. The points of the order polytope are the monotonic...

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Matching polytope

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coordinates. The integral matching polytope (usually called just the matching polytope) of a graph G, denoted MP(G), is a polytope whose corners are...

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Polyhedron

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examples of convex polyhedra. A polyhedron is a 3-dimensional example of a polytope, a more general concept in any number of dimensions. Convex polyhedra are...

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Normal polytope

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statement. All order polytopes are known to be compressed. This implies that these polytopes are normal. A lattice polytope is integrally closed if and only...

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Fractional matching

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one of them has less non-integral fractions. Given a graph G = (V,E), the fractional matching polytope of G is a convex polytope that represents all possible...

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Perfect graph

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{\displaystyle x\geq 0} , A x ≤ 1 {\displaystyle Ax\leq 1} form an integral polytope. It is the convex hull of the indicator vectors of independent sets...

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Euclidean plane

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{\displaystyle \mathbb {R} ^{3}} . In two dimensions, there are infinitely many polytopes: the polygons. The first few regular ones are shown below: The Schläfli...

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Tetrahedron

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tetrahedra characteristic tetrahedra, because of their integral relationship to the regular polytopes and their symmetry groups. For example, the special...

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Simplex algorithm

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neighborhoods of the vertices) of a geometric object called a polytope. The shape of this polytope is defined by the constraints applied to the objective function...

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Linear programming relaxation

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(mixed) integer linear program is the problem that arises by removing the integrality constraint of each variable. For example, in a 0–1 integer program, all...

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Simplex

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dimensions. The simplex is so-named because it represents the simplest possible polytope in any given dimension. For example, a 0-dimensional simplex is a point...

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Cauchy theorem

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theorem (group theory) Cauchy's theorem (geometry) on rigidity of convex polytopes The Cauchy–Kovalevskaya theorem concerning partial differential equations...

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Total dual integrality

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Further, Giles and Pulleyblank showed that if P {\displaystyle P} is a polytope whose vertices are all integer valued, then P {\displaystyle P} is the...

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E8 lattice

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simplices. The vertex figure of Gosset's honeycomb is the semiregular E8 polytope (421 in Coxeter's notation) given by the convex hull of the 240 roots of...

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Complex polygon

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of a real polygon. As such it is an example of the more general complex polytope in any number of complex dimensions. In a real plane, a visible figure...

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