Sectional number of a graph homomorphism
DOI:
https://doi.org/10.15381/pesquimat.v26i2.27116Keywords:
Graph, graph homomorphism, cross-section, sectional number, coloring, chromatic numberAbstract
In this work we will present the notion of sectional number of a graph homomorphism together with basic results about this numerical invariant. We will use this number to study the chromatic number of graphs.
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Copyright (c) 2023 Cesar A. Ipanaque Zapata, Wilman Francisco Cuba Ramos
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