Geometriae Dedicata

, Volume 12, Issue 2, pp 147–162 | Cite as

Euler's relation, möbius functions and matroid identities

  • Raul Cordovil
  • Michel Las Vergnas
  • Arnaldo Mandel
Article

Abstract

We give a short combinatorial proof of the Euler relation for convex polytopes in the context of oriented matroids. Using counting arguments we derive from the Euler relation several identities holding in the lattice of flats of an oriented matroid. These identities are proven for any matroid by Möbius inversion.

Keywords

Convex Polytopes Counting Argument Combinatorial Proof Oriented Matroid Euler Relation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© D. Reidel Publishing Co 1982

Authors and Affiliations

  • Raul Cordovil
    • 1
  • Michel Las Vergnas
    • 2
  • Arnaldo Mandel
    • 3
  1. 1.C. F. M. C. Inst. Nac. Inv. CientLisboa 4Portugal
  2. 2.Centre National de la Recherche, ScientifiqueUniversité Pierre et Marie CurieParisFrance
  3. 3.Instituto de Matématica e EstatisticaU. S. P. Sao PaulBrazil

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