Bryan Phinezy
Western Michigan University
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Publication
Featured researches published by Bryan Phinezy.
Discussiones Mathematicae Graph Theory | 2013
Bryan Phinezy; Ping Zhang
Abstract Two vertices u and v in a nontrivial connected graph G are twins if u and v have the same neighbors in V (G) − {u, v}. If u and v are adjacent, they are referred to as true twins; while if u and v are nonadjacent, they are false twins. For a positive integer k, let c : V (G) → Zk be a vertex coloring where adjacent vertices may be assigned the same color. The coloring c induces another vertex coloring c′ : V (G) → Zk defined by c′(v) = P u∈N[v] c(u) for each v ∈ V (G), where N[v] is the closed neighborhood of v. Then c is called a closed modular k-coloring if c′(u) 6= c′(v) in Zk for all pairs u, v of adjacent vertices that are not true twins. The minimum k for which G has a closed modular k-coloring is the closed modular chromatic number mc(G) of G. The closed modular chromatic number is investigated for trees and determined for several classes of trees. For each tree T in these classes, it is shown that mc(T) = 2 or mc(T) = 3. A closed modular k-coloring c of a tree T is called nowhere-zero if c(x) 6= 0 for each vertex x of T. It is shown that every tree of order 3 or more has a nowhere-zero closed modular 4-coloring.
Mathematica Bohemica | 2010
Futaba Okamoto; Bryan Phinezy; Ping Zhang
Bulletin of the Institute of Combinatorics and its Applications | 2012
Gary Chartrand; Bryan Phinezy; Ping Zhang
Utilitas Mathematica | 2016
Ryan Jones; Bryan Phinezy; Shelley Speiss; Ping Zhang
Ars Combinatoria | 2015
Kyle Kolasinski; Jianwei Lin; Chira Lumduanhom; Bryan Phinezy; Futaba Okamoto
The journal of combinatorial mathematics and combinatorial computing | 2013
Daniel Johnston; Bryan Phinezy; Ping Zhang
Involve, A Journal of Mathematics | 2013
Bryan Phinezy; Ping Zhang
Proceedings of the Forty-Third Southeastern International Conference on Combinatorics, Graph Theory and Computing. Congr. Numer. | 2012
Futaba Okamoto; Bryan Phinezy; Ping Zhang
Proceedings of the Forty-Third Southeastern International Conference on Combinatorics, Graph Theory and Computing. Congr. Numer. | 2012
Bryan Phinezy; Ping Zhang
The journal of combinatorial mathematics and combinatorial computing | 2010
Futaba Okamoto; Bryan Phinezy; Ping Zhang