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Algebra and Discrete Mathematics, 2018, Volume 26, Issue 2, Pages 270–279 (Mi adm683)  
RESEARCH ARTICLE

A formula for the number of weak endomorphisms on paths

Ulrich Knauera, Nirutt Pipattanajindab

a Institut für Mathematik, Carl von Ossietzky Universität, D-26111 Oldenburg, Germany
b Faculty of Sciences and Technology, Kamphaeng Phet Rajabhat University, Kamphaeng Phet, Thailand
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Abstract: A weak endomorphisms of a graph is a mapping on the vertex set of the graph which preserves or contracts edges. In this paper we provide a formula to determine the cardinalities of weak endomorphism monoids of finite undirected paths.
Keywords: path, weak endomorphisms, three-dimensional square lattices.
Received: 24.11.2016
Revised: 09.12.2018
Document Type: Article
MSC: Primary 05C30; Secondary 05C38
Language: English
Citation: Ulrich Knauer, Nirutt Pipattanajinda, “A formula for the number of weak endomorphisms on paths”, Algebra Discrete Math., 26:2 (2018), 270–279
Citation in format AMSBIB
\Bibitem{KnaPip18}
\by Ulrich~Knauer, Nirutt~Pipattanajinda
\paper A formula for the number of weak endomorphisms on paths
\jour Algebra Discrete Math.
\yr 2018
\vol 26
\issue 2
\pages 270--279
\mathnet{http://mi.mathnet.ru/adm683}
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