Results 111 to 120 of about 14,016 (208)

Tropical ideals do not realise all Bergman fans. [PDF]

open access: yesRes Math Sci, 2021
Draisma J, Rincón F.
europepmc   +1 more source

Matroid bases with cardinality constraints on the intersection. [PDF]

open access: yesMath Program, 2022
Lendl S, Peis B, Timmermans V.
europepmc   +1 more source

A module-theoretic approach to matroids

open access: yes, 2019
Speyer recognized that matroids encode the same data as a special class of tropical linear spaces and Shaw interpreted tropically certain basic matroid constructions; additionally, Frenk developed the perspective of tropical linear spaces as modules over
Crowley, Colin   +2 more
core  

Lattice Path Matroids: Structural Properties

open access: yes, 2004
This paper studies structural aspects of lattice path matroids, a class of transversal matroids that is closed under taking minors and duals. Among the basic topics treated are direct sums, duals, minors, circuits, and connected flats.
Bonin, Joseph E., de Mier, Anna
core   +1 more source

Idealness of k-wise intersecting families. [PDF]

open access: yesMath Program, 2022
Abdi A, Cornuéjols G, Huynh T, Lee D.
europepmc   +1 more source

Codes, matroids and derived matroids

open access: yes, 2023
This thesis first introduces some theory on coding theory and matroids, and properties that are shared between these, and then we will investigate derived matroids. In 1979 Longyear made a construction of derived matroids for binary matroids, which illuminates "dependencies among dependencies".
openaire   +1 more source

Parametric matroid interdiction

open access: yesDiscrete Optimization
We introduce the parametric matroid one-interdiction problem. Given a matroid, each element of its ground set is associated with a weight that depends linearly on a real parameter from a given parameter interval. The goal is to find, for each parameter value, one element that, when being removed, maximizes the weight of a minimum weight basis.
Nils Hausbrandt   +3 more
openaire   +3 more sources

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