A two-colored digraph is a digraph each of whose arcs is colored by red or blue. An (h,k)-walk in a two-colored digraph is a walk consisting of h red arcs and k blue arcs. A two-colored digraph is primitive provided that for each pair of vertices u and ν there exists an (h,k)-walk from u to ν and from ν to u. The smallest of such positive integer h+k is called the exponent of D. Let D be a primitive two colored digraph and let ν be a vertex in D. The local exponent of D at the vertex ν, denoted exp(ν,D), is defined to be the smallest positive integer h+k over all nonnegative integers h and k such that for each vertex u in D there exists an (h,k)-walk from ν to u. An (s,n−s)-lollipop is a connected symmetric digraphs on n vertices consisting of an s-cycle and an (n−s)-path with one vertex in common. A two-colored lollipop is called asymmetric provided that the arc (u,ν) is colored red whenever (ν,u) is blue and vice versa. We discuss local exponent of asymmetric two-colored lollipop especially the class (n,0)-lollipop where n is odd. We present formula for local exponent of a vertex ν that depend on n and the distance of ν to a special vertex that lies on the n-cycle.
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4 December 2014
INTERNATIONAL CONFERENCE ON QUANTITATIVE SCIENCES AND ITS APPLICATIONS (ICOQSIA 2014): Proceedings of the 3rd International Conference on Quantitative Sciences and Its Applications
12–14 August 2014
Langkawi, Kedah Malaysia
Research Article|
December 04 2014
Local exponent of asymmetric two-colored lollipops
Muda G. Perangin-angin;
Muda G. Perangin-angin
Department of Mathematics, University of Smatera Utara, Medan 20155,
Indonesia
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Muhammad Fathoni;
Muhammad Fathoni
Department of Mathematics, University of Smatera Utara, Medan 20155,
Indonesia
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Aghni Syahmarani;
Aghni Syahmarani
Department of Mathematics, University of Smatera Utara, Medan 20155,
Indonesia
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Saib Suwilo
Saib Suwilo
Department of Mathematics, University of Smatera Utara, Medan 20155,
Indonesia
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AIP Conf. Proc. 1635, 471–478 (2014)
Citation
Muda G. Perangin-angin, Muhammad Fathoni, Aghni Syahmarani, Saib Suwilo; Local exponent of asymmetric two-colored lollipops. AIP Conf. Proc. 4 December 2014; 1635 (1): 471–478. https://doi.org/10.1063/1.4903624
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