Results 11 to 20 of about 1,131,712 (268)

On the oriented coloring of the disjoint union of graphs

open access: yesRAIRO - Operations Research, 2021
LetG⃗ = (V, A) be an oriented graph andGthe underlying graph ofG⃗. Anorientedk-coloringofG⃗ is a partition ofVintokcolor classes, such that there is no pair of adjacent vertices belonging to the same class and all the arcs between a pair of color classes have the same orientation.
Erika Morais Martins Coelho   +5 more
openaire   +3 more sources

Analogues of cliques for oriented coloring [PDF]

open access: yesDiscussiones Mathematicae Graph Theory, 2004
Considered are subgraphs of oriented graphs in the context of oriented colouring that are analogous to cliques in traditional vertex colouring. Bounds on the sizes of these subgraphs are given for planar, outerplaner and series-parallel graphs. The authors show, among other things, that a planar graph cannot contain an induced subgraph \(D\) with more ...
William Klostermeyer, Gary MacGillivray
openaire   +2 more sources

Large-area straight, regular periodic surface structures produced on fused silica by the interference of two femtosecond laser beams through cylindrical lens

open access: yesOpto-Electronic Advances, 2021
Inhomogeneity and low efficiency are two important factors that limit the application of laser-induced periodic surface structures (LIPSSs), especially on glass surfaces.
Long Chen   +7 more
doaj   +1 more source

Competitive Colorings of Oriented Graphs [PDF]

open access: yesThe Electronic Journal of Combinatorics, 2000
Nešetřil and Sopena introduced a concept of oriented game chromatic number and developed a general technique for bounding this parameter. In this paper, we combine their technique with concepts introduced by several authors in a series of papers on game chromatic number to show that for every positive integer $k$, there exists an integer $t$ so that ...
Henry A. Kierstead, William T. Trotter
openaire   +2 more sources

Linear choosability of graphs [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2005
A proper vertex coloring of a non oriented graph $G=(V,E)$ is linear if the graph induced by the vertices of two color classes is a forest of paths. A graph $G$ is $L$-list colorable if for a given list assignment $L=\{L(v): v∈V\}$, there exists a proper
Louis Esperet   +2 more
doaj   +1 more source

Phenomenological Reading of the Colors of a Persian Painting from the book of Samak Ayyar of Al-Injou’s Period by Relying on the Theories of Najmuddin Kubra [PDF]

open access: yesمجله مطالعات ایرانی, 2022
Introduction Persian painting is one of the critical contexts for the emergence and design of Persian and Islamic wisdom, which has a long life in the history of illustration of this land.
Fatemeh Mehrabi
doaj   +1 more source

Generalized colorings and avoidable orientations [PDF]

open access: yesDiscussiones Mathematicae Graph Theory, 1997
This paper initiates the study of characterizations for the existence of generalized graph colorings in terms of avoidable orientations. If \({\mathcal P}_1,\dots ,{\mathcal P}_k\) are families of graphs, a \(({\mathcal P}_1,\dots , {\mathcal P}_k)\)-coloring of a graph \(G\) is a partition of the vertex set of \(G\) into \(k\) subsets \(V_1,\dots ,V_k\
Szigeti, Jenő, Tuza, Zsolt
openaire   +3 more sources

Content validity of D-MESS: Articulate storyline 3-based learning media in sport massage courses

open access: yesJournal Sport Area, 2023
The development of innovative learning media is one of the solutions for educators in the learning process in higher education in the current era of digital and technological disruption.
Gede Doddy Tisna MS   +3 more
doaj   +1 more source

Smart and Sustainable Hair Products Based on Chitin-Derived Compounds

open access: yesCosmetics, 2021
According to previous research studies, consumers worldwide are searching for new natural-oriented hair products that are both skin and environmentally friendly.
Pierfrancesco Morganti   +2 more
doaj   +1 more source

Aspects of Villa-Lobos’s Tonal Style in Some of His Studies for Guitar

open access: yesRevista Vortex, 2020
The goal of this paper is to shed new light on selected strategies that characterize the tonal style of the first nine studies of the set by means of examining Villa- Lobos’s treatment of tonality from a perspective that takes into account the role of ...
Gabriel Navia
doaj   +1 more source

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