Results 31 to 40 of about 732,643 (255)

On Transmission Irregular Cubic Graphs of an Arbitrary Order

open access: yesMathematics, 2022
The transmission of a vertex v of a graph G is the sum of distances from v to all the other vertices of G. A transmission irregular graph (TI graph) has mutually distinct vertex transmissions.
Anatoly Yu. Bezhaev, Andrey A. Dobrynin
doaj   +1 more source

On infinite outerplanar graphs [PDF]

open access: yes, 1990
summary:In this Note, we study infinite graphs with locally finite outerplane embeddings, given a characterization by forbidden ...
Boza, L.   +6 more
core   +1 more source

Some spectral comparison results on infinite quantum graphs [PDF]

open access: yes, 2023
In this paper we establish spectral comparison results for Schrödinger operators on a certain class of infinite quantum graphs, using recent results obtained in the finite setting.
Bifulco, Patrizio, Kerner, Joachim
core   +1 more source

An introduction of F-graphs, a graph-theoretic representation of natural numbers

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1992
A special type of family graphs (F-graphs, for brevity) are introduced. These are cactus-type graphs which form infinite families under an attachment operation. Some of the characterizing properties of F-graphs are discussed.
E. J. Farrell
doaj   +1 more source

On external presentations of infinite graphs [PDF]

open access: yesElectronic Proceedings in Theoretical Computer Science, 2009
The vertices of a finite state system are usually a subset of the natural numbers. Most algorithms relative to these systems only use this fact to select vertices.
Christophe Morvan
doaj   +1 more source

Arithmetically maximal independent sets in infinite graphs [PDF]

open access: yes, 2005
Families of all sets of independent vertices in graphs are investigated. The problem how to characterize those infinite graphs which have arithmetically maximal independent sets is posed.
Bylka, Stanisław
core   +1 more source

Linearly bounded infinite graphs [PDF]

open access: yes, 2005
Linearly bounded Turing machines have been mainly studied as acceptors for context-sensitive languages. We define a natural class of infinite automata representing their observable computational behavior, called linearly bounded graphs.
Meyer, Antoine   +3 more
core   +1 more source

On infinite outerplanar graphs [PDF]

open access: yes, 1994
In this Note, we study infinite graphs with locally finite outerplane embeddings, given a characterization by forbidden ...
Márquez Pérez, Alberto   +2 more
core   +1 more source

Note on robust coloring of planar graphs [PDF]

open access: yesOpuscula Mathematica
We consider the robust chromatic number \(\chi_1(G)\) of planar graphs \(G\) and show that there exists an infinite family of planar graphs \(G\) with \(\chi_1(G) = 3\), thus solving a recent problem of Bacsó et al.
František Kardoš   +2 more
doaj   +1 more source

On P-transitive graphs and applications [PDF]

open access: yesElectronic Proceedings in Theoretical Computer Science, 2011
We introduce a new class of graphs which we call P-transitive graphs, lying between transitive and 3-transitive graphs. First we show that the analogue of de Jongh-Sambin Theorem is false for wellfounded P-transitive graphs; then we show that the mu ...
Giacomo Lenzi
doaj   +1 more source

Home - About - Disclaimer - Privacy