Abstract
We prove that the copnumber of a finite connected graph of genus g is bounded by [3/2g]+3. In particular this means that the copnumber of a toroidal graph is bounded by 4. We also sketch a proof that the copnumber of a graph of genus 2 is bounded by 5.
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Schröder, B.S.W. (2001). The Copnumber of a Graph is Bounded by [3/2 genus (G)] + 3. In: Koslowski, J., Melton, A. (eds) Categorical Perspectives. Trends in Mathematics. Birkhäuser, Boston, MA. https://doi.org/10.1007/978-1-4612-1370-3_14
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DOI: https://doi.org/10.1007/978-1-4612-1370-3_14
Publisher Name: Birkhäuser, Boston, MA
Print ISBN: 978-1-4612-7117-8
Online ISBN: 978-1-4612-1370-3
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