Stiefel tropical linear spaces

The tropical Stiefel map associates to a tropical matrix A its tropical Plücker vector of maximal minors, and thus a tropical linear space L(A). We call the L(A)s obtained in this way Stiefel tropical linear spaces. We prove that they are dual to certain matroid subdivisions of polytopes of transver...

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Published inJournal of combinatorial theory. Series A Vol. 135; pp. 291 - 331
Main Authors Fink, Alex, Rincón, Felipe
Format Journal Article
LanguageEnglish
Published Elsevier Inc 01.10.2015
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ISSN0097-3165
1096-0899
DOI10.1016/j.jcta.2015.06.001

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Abstract The tropical Stiefel map associates to a tropical matrix A its tropical Plücker vector of maximal minors, and thus a tropical linear space L(A). We call the L(A)s obtained in this way Stiefel tropical linear spaces. We prove that they are dual to certain matroid subdivisions of polytopes of transversal matroids, and we relate their combinatorics to a canonically associated tropical hyperplane arrangement. We also explore a broad connection with the secondary fan of the Newton polytope of the product of all maximal minors of a matrix. In addition, we investigate the natural parametrization of L(A) arising from the tropical linear map defined by A.
AbstractList The tropical Stiefel map associates to a tropical matrix A its tropical Plücker vector of maximal minors, and thus a tropical linear space L(A). We call the L(A)s obtained in this way Stiefel tropical linear spaces. We prove that they are dual to certain matroid subdivisions of polytopes of transversal matroids, and we relate their combinatorics to a canonically associated tropical hyperplane arrangement. We also explore a broad connection with the secondary fan of the Newton polytope of the product of all maximal minors of a matrix. In addition, we investigate the natural parametrization of L(A) arising from the tropical linear map defined by A.
Author Rincón, Felipe
Fink, Alex
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  surname: Rincón
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  email: e.f.rincon@warwick.ac.uk
  organization: Mathematics Institute, University of Warwick, United Kingdom
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Keywords Transversal matroids
Stiefel map
Tropical linear spaces
Mixed subdivisions
Matchings
Matroid polytope subdivisions
Tropical hyperplane arrangements
Language English
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Snippet The tropical Stiefel map associates to a tropical matrix A its tropical Plücker vector of maximal minors, and thus a tropical linear space L(A). We call the...
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SubjectTerms Matchings
Matroid polytope subdivisions
Mixed subdivisions
Stiefel map
Transversal matroids
Tropical hyperplane arrangements
Tropical linear spaces
Title Stiefel tropical linear spaces
URI https://dx.doi.org/10.1016/j.jcta.2015.06.001
Volume 135
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