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Matroid partitioning information


Matroid partitioning is a problem arising in the mathematical study of matroids and in the design and analysis of algorithms. Its goal is to partition the elements of a matroid into as few independent sets as possible. An example is the problem of computing the arboricity of an undirected graph, the minimum number of forests needed to cover all of its edges. Matroid partitioning may be solved in polynomial time, given an independence oracle for the matroid. It may be generalized to show that a matroid sum is itself a matroid, to provide an algorithm for computing ranks and independent sets in matroid sums, and to compute the largest common independent set in the intersection of two given matroids.[1]

  1. ^ Scheinerman, Edward R.; Ullman, Daniel H. (1997), "5. Fractional arboricity and matroid methods", Fractional graph theory, Wiley-Interscience Series in Discrete Mathematics and Optimization, New York: John Wiley & Sons Inc., pp. 99–126, ISBN 0-471-17864-0, MR 1481157.

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Matroid partitioning

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Matroid partitioning is a problem arising in the mathematical study of matroids and in the design and analysis of algorithms. Its goal is to partition...

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Matroid

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of a matroid. The matroid partitioning problem is to partition the elements of a matroid into as few independent sets as possible, and the matroid packing...

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Partition matroid

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In mathematics, a partition matroid or partitional matroid is a matroid that is a direct sum of uniform matroids. It is defined over a base set in which...

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Matroid intersection

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two matroids can be solved in polynomial time using matroid partitioning algorithms. Let G = (U,V,E) be a bipartite graph. One may define a partition matroid...

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List of partition topics

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Feshbach–Fano partitioning Foliation Frequency partition Graph partition Kernel of a function Lamination (topology) Matroid partitioning Multipartition...

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Graphic matroid

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In the mathematical theory of matroids, a graphic matroid (also called a cycle matroid or polygon matroid) is a matroid whose independent sets are the...

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Partition of a set

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geometric lattices and matroids, this lattice of partitions of a finite set corresponds to a matroid in which the base set of the matroid consists of the atoms...

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Matroid oracle

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mathematics and computer science, a matroid oracle is a subroutine through which an algorithm may access a matroid, an abstract combinatorial structure...

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Shannon switching game

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each connecting the distinguished vertices, can be represented as a matroid partitioning problem, which can be solved in polynomial time. Alternatively, it...

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Basis of a matroid

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In mathematics, a basis of a matroid is a maximal independent set of the matroid—that is, an independent set that is not contained in any other independent...

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Balanced number partitioning

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Balanced number partitioning is a variant of multiway number partitioning in which there are constraints on the number of items allocated to each set...

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Paving matroid

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mathematical theory of matroids, a paving matroid is a matroid in which every circuit has size at least as large as the matroid's rank. In a matroid of rank r {\displaystyle...

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Arboricity

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special case of a more general matroid partitioning problem, in which one wishes to express a set of elements of a matroid as a union of a small number...

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Bipartite matroid

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to binary matroids: a binary matroid is bipartite if and only if its dual matroid is an Eulerian matroid, a matroid that can be partitioned into disjoint...

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Combinatorics

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Not only the structure but also enumerative properties belong to matroid theory. Matroid theory was introduced by Hassler Whitney and studied as a part...

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Matroid rank

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theory of matroids, the rank of a matroid is the maximum size of an independent set in the matroid. The rank of a subset S of elements of the matroid is, similarly...

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Dual matroid

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In matroid theory, the dual of a matroid M {\displaystyle M} is another matroid M ∗ {\displaystyle M^{\ast }} that has the same elements as M {\displaystyle...

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Matroid representation

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theory of matroids, a matroid representation is a family of vectors whose linear independence relation is the same as that of a given matroid. Matroid representations...

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Uniform matroid

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In mathematics, a uniform matroid is a matroid in which the independent sets are exactly the sets containing at most r elements, for some fixed integer...

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Dual graph

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matroid of M. Then Whitney's planarity criterion can be rephrased as stating that the dual matroid of a graphic matroid M is itself a graphic matroid...

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Signed graph

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are two matroids associated with a signed graph, called the signed-graphic matroid (also called the frame matroid or sometimes bias matroid) and the...

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Arrangement of hyperplanes

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semilattice, there is an analogous matroid-like structure called a semimatroid, which is a generalization of a matroid (and has the same relationship to...

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Eulerian matroid

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In matroid theory, an Eulerian matroid is a matroid whose elements can be partitioned into a collection of disjoint circuits. In a uniform matroid U n...

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Binary matroid

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matroid theory, a binary matroid is a matroid that can be represented over the finite field GF(2). That is, up to isomorphism, they are the matroids whose...

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Matroid minor

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of matroids, a minor of a matroid M is another matroid N that is obtained from M by a sequence of restriction and contraction operations. Matroid minors...

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Matroid parity problem

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Graphic matroids and partition matroids are special cases of linear matroids. In the matroid parity problem, the input consists of a matroid together...

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