Results 111 to 120 of about 34,455 (233)

Ends in digraphs

open access: yesDiscrete Mathematics, 1998
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire   +3 more sources

A new sufficient condition for a 2-strong digraph to be Hamiltonian [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science
In this paper we prove the following new sufficient condition for a digraph to be Hamiltonian: {\it Let $D$ be a 2-strong digraph of order $n\geq 9$. If $n-1$ vertices of $D$ have degrees at least $n+k$ and the remaining vertex has degree at least $n-
Samvel Kh. Darbinyan
doaj   +1 more source

Majority Digraphs

open access: yesProceedings of the American Mathematical Society, 2016
A majority digraph is a finite simple digraph G = ( V , → ) G=(V,\to ) such that there exist finite sets A v A_v for the vertices v ∈ V v\in V with the following property: u → v
Lai, Tri   +2 more
openaire   +3 more sources

Directed graph theory for the analysis of biological regulatory networks

open access: yesFrontiers in Applied Mathematics and Statistics
Synchronous regulated biological networks are often represented as logical diagrams, where the precise interactions between elements remain obscured. Here, we introduce a novel type of excitation-inhibition graph based on Boolean logic, which we term ...
Martha Takane   +8 more
doaj   +1 more source

The Double Roman Domatic Number of a Digraph

open access: yesDiscussiones Mathematicae Graph Theory, 2020
A double Roman dominating function on a digraph D with vertex set V (D) is defined in [G. Hao, X. Chen and L. Volkmann, Double Roman domination in digraphs, Bull. Malays. Math. Sci. Soc. (2017).] as a function f : V (D) → {0, 1, 2, 3} having the property
Volkmann Lutz
doaj   +1 more source

From expanded digraphs to lifts of voltage digraphs and line digraphs

open access: yes, 2016
Research of the first two authors is supported by MINECO under project MTM2014-60127-P, and by AGAUR under project 2014SGR1147.
Dalfó, C.   +3 more
openaire   +3 more sources

Minimal positive realizations of linear continuous-time fractional descriptor systems: Two cases of an input-output digraph structure

open access: yesInternational Journal of Applied Mathematics and Computer Science, 2018
In the last two decades, fractional calculus has become a subject of great interest in various areas of physics, biology, economics and other sciences. The idea of such a generalization was mentioned by Leibniz and L’Hospital.
Markowski Konrad Andrzej
doaj   +1 more source

Randomly hamiltonian digraphs [PDF]

open access: bronze, 1969
Gary Chartrand   +2 more
openalex   +1 more source

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