Results 131 to 140 of about 339,827 (235)

Small sets supporting fary embeddings of planar graphs [PDF]

open access: bronze, 1988
Hubert de Fraysseix   +2 more
openalex   +1 more source

A note on the coprime graph of a group [PDF]

open access: yesInternational Journal of Group Theory, 2016
In this paper we study the coprime graph of a group $G$. The coprime graph of a group $G$, is a graph whose vertices are elements of $G$ and two distinct vertices $x$ and $y$ are adjacent iff $(|x|,|y|)=1$.
Hamid Reza Dorbidi
doaj  

On uniquely colorable planar graphs

open access: bronze, 1969
Gary Chartrand, Dennis P. Geller
openalex   +1 more source

A spherical fuzzy planar graph approach to optimize wire configuration in transformers

open access: yesFrontiers in Physics
In this modern era, graph theory has become an integral part of science and technology. It has enormous applications in handling various design-based problems.
Hao Guan   +5 more
doaj   +1 more source

Maximal planar graphs that embed as centers [PDF]

open access: yesarXiv
A maximal planar graph is a graph which can be embedded in the plane such that every face of the graph is a triangle. The center of a graph is the subgraph induced by the vertices of minimum eccentricity. We introduce the notion of quasi-eccentric vertices, and use this to characterize maximal planar graphs that are the center of some planar graph.
arxiv  

Algorithmic methods of finite discrete structures. Topological graph drawing (part I) [PDF]

open access: yesarXiv
Modern methods of graph theory describe a graph up to isomorphism, which makes it difficult to create mathematical models for visualizing graph drawings on a plane. The topological drawing of the planar part of a graph allows representing the planarization process by algebraic methods, without making any geometric constructions on the plane ...
arxiv  

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