Results 61 to 70 of about 1,353,416 (150)

Flat foldings of plane graphs with prescribed angles and edge lengths

open access: yesJournal of Computational Geometry, 2018
When can a plane graph with prescribed edge lengths and prescribed angles (from among $\{0,180^\circ, 360^\circ\}$) be folded flat to lie in an infinitesimally thick line, without crossings?
Zachary Abel   +5 more
doaj   +1 more source

On the Laplacian spectral radii of Halin graphs

open access: yesJournal of Inequalities and Applications, 2017
Let T be a tree with at least four vertices, none of which has degree 2, embedded in the plane. A Halin graph is a plane graph constructed by connecting the leaves of T into a cycle. Thus the cycle C forms the outer face of the Halin graph, with the tree
Huicai Jia, Jie Xue
doaj   +1 more source

Genus Distribution for a Graph [PDF]

open access: yes, 2009
In this paper we develop the technique of a distribution decomposition for a graph. A formula is given to determine genus distribution of a cubic graph.
Liangxia, Wan   +2 more
core   +1 more source

Unique-Maximum Coloring Of Plane Graphs

open access: yesDiscussiones Mathematicae Graph Theory, 2016
A unique-maximum k-coloring with respect to faces of a plane graph G is a coloring with colors 1, . . . , k so that, for each face of G, the maximum color occurs exactly once on the vertices of α.
Fabrici Igor, Göring Frank
doaj   +1 more source

Tulgeity of Line, Middle and Total Graph of Wheel Graph Families [PDF]

open access: yes, 2010
Tulgeity r(G) is the maximum number of disjoint, point induced, non acyclic subgraphs contained in G. In this paper one finds the tulgeity of line, middle and total graph of wheel graph, Gear graph and Helm ...
Vernold, Vivin   +2 more
core   +1 more source

Flat Foldings of Plane Graphs with Prescribed Angles and Edge Lengths [PDF]

open access: yes, 2014
When can a plane graph with prescribed edge lengths and prescribed angles (from among {0,180°, 360°}) be folded flat to lie in an infinitesimally thick line, without crossings?
David Eppstein   +13 more
core   +1 more source

Graph Homomorphism Revisited for Graph Matching [PDF]

open access: yes, 2010
In a variety of emerging applications one needs to decide whether a graph G matches another Gp, i.e., whether G has a topological structure similar to that of Gp. The traditional notions of graph homomorphism and isomorphism often fall short of capturing
Li, Jianzhong   +4 more
core  

On Pathos Semitotal and Total Block Graph of a Tree [PDF]

open access: yes, 2011
The concept of pathos of a graph G was introduced by Harary [2], as a collection of minimum number of line disjoint open paths whose union is G. The path number of a graph G is the number of paths in pathos.
Muddebihal M. H.
core   +1 more source

Odd facial total-coloring of unicyclic plane graphs [PDF]

open access: yesDiscrete Mathematics Letters, 2022
Július Czap
doaj   +1 more source

The H-Line Signed Graph of a Signed Graph [PDF]

open access: yes, 2010
For standard terminology and notion in graph theory we refer the reader to Harary; the non-standard will be given in this paper as and when required.
Reddy, Siva Kota   +2 more
core   +1 more source

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