Results 201 to 210 of about 1,402,601 (292)

Explicit 3‐colorings for Exponential Graphs

Journal of Graph Theory, EarlyView.
ABSTRACT In 1985, El‐Zahar and Sauer showed that the chromatic number of the direct product of two 4‐chromatic graphs is 4, establishing a nontrivial case of Hedetniemi's conjecture, which has since been refuted in general. Their proof uses the concept of an exponential graph, showing that if a graph H $H$ has no proper 3‐coloring, then the exponential
Adrien Argento, Pierre Charbit, Alantha Newman   +2 more
wiley   +1 more source

DualStream-RTNet: A Multimodal Deep Learning Framework for Grape Cultivar Classification and Soluble Solid Content Prediction. [PDF]

Foods
Liu Z, Song Y, Liu A, Meng X, Liu C, Li S, Wang X, Teng G.   +7 more
europepmc   +1 more source

Flexible List Coloring of Graphs With Maximum Average Degree Less Than 3

Journal of Graph Theory, EarlyView.
ABSTRACT In the flexible list coloring problem, we consider a graph G $G$ and a color list assignment L $L$ on G $G$, as well as a subset U ⊆ V ( G ) $U\subseteq V(G)$ for which each u ∈ U $u\in U$ has a preferred color p ( u ) ∈ L ( u ) $p(u)\in L(u)$. Our goal is to find a proper L $L$‐coloring ϕ $\phi $ of G $G$ such that ϕ ( u ) = p ( u ) $\phi (u)=
Richard Bi, Peter Bradshaw
wiley   +1 more source

In vitro performance of violet LED and argon plasma with oxygen on dentin bleaching. [PDF]

Braz Dent J
Aidar KMS, Esteves LMB, Santos PHD, Strazzi-Sahyon HB, Delben JA, Nascimento VD, Cadorin BM, Fagundes TC, Briso ALF.   +8 more
europepmc   +1 more source

Path Degeneracy and Applications

Journal of Graph Theory, EarlyView.
ABSTRACT In this work, we relate girth and path‐degeneracy in classes with sub‐exponential expansion, with explicit bounds for classes with polynomial expansion and proper minor‐closed classes that are tight up to a constant factor (and tight up to second order terms if a classical conjecture on existence of g $g$‐cages is verified). As an application,
Yuquan Lin, Patrice Ossona de Mendez
wiley   +1 more source

Colors for Resources: Reward-Linked Visual Displays in Orchids. [PDF]

Plants (Basel)
Coimbra G, Nunes CEP, Bergamo PJ, Aguiar JMRBV, Freitas L.   +4 more
europepmc   +1 more source

On Sparsity Conditions Guaranteeing a Fractional Coloring

Journal of Graph Theory, EarlyView.
ABSTRACT A graph has an ( a : b ) $(a:b)$ ‐coloring if there exists an assignment from the vertices to subsets of { 1 , … , a } $\{1,\ldots ,a\}$ with size b $b$ such that adjacent vertices are assigned disjoint subsets. Odd girth at least 2 k + 1 $2k+1$ is a necessary condition for a graph to have a ( 2 k + 1 : k ) $(2k+1:k)$‐coloring.
Ilkyoo Choi
wiley   +1 more source

Effect of Acidification on the Properties of Films Developed from Carboxymethylcellulose and Jabuticaba Anthocyanin Extract (<i>Plinia Cauliflora</i>). [PDF]

ACS Omega
Ponciano CDS, de Oliveira CP.
europepmc   +1 more source

Farming in the shadows of Rome: A multi‐proxy palaeoenvironmental record from Loch Clunie—Perthshire

Journal of Quaternary Science, EarlyView.
ABSTRACT Roman impacts on local society is a subject of international significance. Loch Clunie, Perthshire, lies only 5.4 km from Inchtuthil, the only Roman legionary fortress in Scotland, and contains two crannogs and a probable lakeside hillfort. Despite this proximity and the likelihood of local–Roman interaction, these sites remain unexcavated ...
Samantha E. Jones, Maarten Blaauw, Fraser Hunter, Olalla López‐Costas, Antonio Martínez Cortizas, Tim M. Mighall, Gordon Noble   +6 more
wiley   +1 more source

Cognition does not automatically influence perception: Evidence from neural encoding of colors belonging to different categories. [PDF]

Proc Natl Acad Sci U S A
Martinovic J, Delov AA, Tomastikova J, Martin JT, Paramei GV, Griber YA.   +5 more
europepmc   +1 more source