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pro vyhledávání: '"Sampathkumar, E."'
Autor:
Sampathkumar, E.
\qquad A \emph{coloring} of a digraph $D=(V,E)$ is a coloring of its vertices following the rule: Let $uv$ be an arc in $D$. If the tail $u$ is colored first, then the head $v$ should receive a color different from that of $u$. The \emph{dichromatic
Externí odkaz:
http://arxiv.org/abs/1304.0081
Autor:
Sampathkumar, E., Sriraj, M. A.
A \emph{directional labeling} of an edge $\emph{uv}$ in a graph $G=(V,E)$ by an ordered pair $ab$ is a labeling of the edge $uv$ such that the label on $uv$ in the direction from $u$ to $v$ is $\ell(uv)=ab$, and $\ell(vu)=ba$. New characterizations o
Externí odkaz:
http://arxiv.org/abs/1304.0083
Publikováno v:
Journal of Combinatorics, Information and System Sciences, 37 (2012), no. 2-4, 373--377. Zbl 1301.05161
An edge uv in a graph \Gamma\ is directionally 2-signed (or, (2,d)-signed) by an ordered pair (a,b), a,b in {+,-}, if the label l(uv) = (a,b) from u to v, and l(vu) = (b,a) from v to u. Directionally 2-signed graphs are equivalent to bidirected graph
Externí odkaz:
http://arxiv.org/abs/1303.3084
Publikováno v:
Discussiones Mathematicae Graph Theory, Vol 34, Iss 4, Pp 707-721 (2014)
Let G be a vertex colored graph. The minimum number χ(G) of colors needed for coloring of a graph G is called the chromatic number. Recently, Adiga et al. [1] have introduced the concept of color energy of a graph Ec(G) and computed the color energy
Externí odkaz:
https://doaj.org/article/5694a2dd0f044f5a8541ddddbea9ca71
Publikováno v:
In Discrete Mathematics 28 July 2012 312(14):2102-2108
Publikováno v:
In Discrete Mathematics 2012 312(3):561-573
Publikováno v:
In Electronic Notes in Discrete Mathematics 2003 15:168-174
Publikováno v:
In Electronic Notes in Discrete Mathematics 2003 15:164-167
Publikováno v:
International Journal of Engineering Research and.
Autor:
SAMPATHKUMAR, E.1 esampathkumar@gmail.com, SRIRAJ, M. A.1 srinivasasriraj@yahoo.co.in
Publikováno v:
Journal of Combinatorics, Information & System Sciences. Jan-Dec2013, Vol. 38 Issue 1-4, p113-120. 8p.