Dessins, their delta-matroids and partial duals

Goran Malic

Research output: Chapter in Book/Conference proceedingConference contribution

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Abstract

Given a map M on a connected and closed orientable surface, the delta-matroid of M is a combinatorial object associated to M which captures some topological information of the embedding. We explore how delta-matroids associated to dessins d'enfants behave under the action of the absolute Galois group. Twists of delta-matroids are considered as well; they correspond to the recently introduced operation of partial duality of maps. Furthermore, we prove that every map has a partial dual defined over its field of moduli. A relationship between dessins, partial duals and tropical curves arising from the cartography groups of dessins is observed as well.
Original languageEnglish
Title of host publicationSymmetries in graphs, maps and polytopes
Subtitle of host publication 5th SIGMAP Workshop, West Malvern, UK, July 2014
EditorsJozef Širáň, Robert Jajcay
Place of PublicationCham
PublisherSpringer Nature
Pages213-247
ISBN (Print) 9783319304496
Publication statusPublished - 2016
Event5th Workshop SIGMAP - Symmetries In Graph, Maps And Polytopes - ELIM Conference Centre, West Malvern, U.K.
Duration: 7 Jul 201411 Jul 2014

Publication series

NameSpringer Proceedings in Mathematics & Statistic
PublisherSpringer
Name
Volume159

Conference

Conference5th Workshop SIGMAP - Symmetries In Graph, Maps And Polytopes
CityELIM Conference Centre, West Malvern, U.K.
Period7/07/1411/07/14

Keywords

  • dessins
  • matroids
  • partial duals

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