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From Farkas' Lemma to Linear Programming: an Exercise in Diagrammatic Algebra ((Co)algebraic pearls)

Authors Filippo Bonchi , Alessandro Di Giorgio , Fabio Zanasi

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Subject Classification

ACM Subject Classification
  • Theory of computation → Categorical semantics
Keywords
  • String diagrams
  • Farkas Lemma
  • Duality
  • Linear Programming

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Abstract

Farkas' lemma is a celebrated result on the solutions of systems of linear inequalities, which finds application pervasively in mathematics and computer science. In this work we show how to formulate and prove Farkas' lemma in diagrammatic polyhedral algebra, a sound and complete graphical calculus for polyhedra. Furthermore, we show how linear programs can be modeled within the calculus and how some famous duality results can be proved.

Cite As Get BibTex

Filippo Bonchi, Alessandro Di Giorgio, and Fabio Zanasi. From Farkas' Lemma to Linear Programming: an Exercise in Diagrammatic Algebra ((Co)algebraic pearls). In 9th Conference on Algebra and Coalgebra in Computer Science (CALCO 2021). Leibniz International Proceedings in Informatics (LIPIcs), Volume 211, pp. 9:1-9:19, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2021) https://doi.org/10.4230/LIPIcs.CALCO.2021.9

Author Details

Filippo Bonchi
  • University of Pisa, Italy
Alessandro Di Giorgio
  • University of Pisa, Italy
Fabio Zanasi
  • University College London, UK

Funding

  • Bonchi, Filippo: Supported by the Ministero dell’Università e della Ricerca of Italy under Grant No. 201784YSZ5, PRIN2017 – ASPRA (Analysis of Program Analyses).
  • Di Giorgio, Alessandro: Supported by the Ministero dell’Università e della Ricerca of Italy under Grant No. 201784YSZ5, PRIN2017 – ASPRA (Analysis of Program Analyses).
  • Zanasi, Fabio: Supported by epsrc EP/V002376/1.

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