Results 111 to 120 of about 12,413 (296)

Strong Edge-Coloring Of Planar Graphs

open access: yesDiscussiones Mathematicae Graph Theory, 2017
A strong edge-coloring of a graph is a proper edge-coloring where each color class induces a matching. We denote by 𝜒's(G) the strong chromatic index of G which is the smallest integer k such that G can be strongly edge-colored with k colors. It is known
Song Wen-Yao, Miao Lian-Ying
doaj   +1 more source

Odd edge coloring of graphs

open access: yesArs Mathematica Contemporanea, 2015
An edge coloring of a graph G is said to be an odd edge coloring if for each vertex v ofG and each colorc, the vertexv uses the colorc an odd number of times or does not use it at all. In [5], Pyber proved that 4 colors suffice for an odd edge coloring of any simple graph.
Borut Luzar   +2 more
openaire   +3 more sources

Faster Edge Coloring by Partition Sieving [PDF]

open access: yes
In the Edge Coloring problem, we are given an undirected graph G with n vertices and m edges, and are tasked with finding the smallest positive integer k so that the edges of G can be assigned k colors in such a way that no two edges incident to the same
Koana, Tomohiro, Akmal, Shyan
core   +1 more source

Mycobacterial cell division arrest and smooth‐to‐rough envelope transition using CRISPRi‐mediated genetic repression systems

open access: yesFEBS Open Bio, EarlyView.
CRISPRI‐mediated gene silencing and phenotypic exploration in nontuberculous mycobacteria. In this Research Protocol, we describe approaches to control, monitor, and quantitatively assess CRISPRI‐mediated gene silencing in M. smegmatis and M. abscessus model organisms.
Vanessa Point   +7 more
wiley   +1 more source

Polarization‐resolved femtosecond Vis/IR spectroscopy tailored for resolving weak signals in biological samples using minimal sample volume

open access: yesFEBS Open Bio, EarlyView.
Unique biological samples, such as site‐specific mutant proteins, are available only in limited quantities. Here, we present a polarization‐resolved transient infrared spectroscopy setup with referencing to improve signal‐to‐noise tailored towards tracing small signals. We provide an overview of characterizing the excitation conditions for polarization‐
Clark Zahn, Karsten Heyne
wiley   +1 more source

Cartesian积与邻点可区别着色之间的关系(Relation between Cartesian product and adjacent vertex distinguishing coloring)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2017
A proper k-edge coloring of a graph G is an assignment of k colors 1, 2, …, k to edges of G such that any two adjacent edges receive the different colors.
WANGGuoxing(王国兴)
doaj   +1 more source

Parsimonious edge-coloring on surfaces

open access: yesElectronic Journal of Graph Theory and Applications, 2018
We correct a small error in a 1996 paper of Albertson and Haas, and extend their lower bound for the fraction of properly colorable edges of planar subcubic graphs that are simple, connected, bridgeless, and edge-maximal to other surface embeddings of ...
Sarah-Marie Belcastro
doaj   +1 more source

C2α‐carbanion‐protonating glutamate discloses tradeoffs between substrate accommodation and reaction rate in actinobacterial 2‐hydroxyacyl‐CoA lyase

open access: yesFEBS Open Bio, EarlyView.
Enzymes of the 2‐hydroxyacyl‐CoA lyase group catalyze the condensation of formyl‐CoA with aldehydes or ketones. Thus, by structural adaptation of active sites, practically any pharmaceutically and industrially important 2‐hydroxyacid could be biotechnologically synthesized. Combining crystal structure analysis, active site mutations and kinetic assays,
Michael Zahn   +4 more
wiley   +1 more source

Distributed Edge Coloring and Locally Sparse Graph Coloring

open access: yes, 2014
Graph coloring is a central problem in distributed computing. In this work, we study both the edge coloring and vertex coloring problems. For constant ɛ> 0, we give a distributed algorithm for (1 + ɛ)∆-edge coloring running in O(log ∗ log n ∆ · max(1,
Hsin-hao Su, Seth Pettie, Michael Elkin
core  

Approximation Algorithms for Distance-2 Edge Coloring [PDF]

open access: yes, 2002
The authors consider the link scheduling problem for packet radio networks which is assigning channels to the connecting links so that transmission may proceed on all links assigned the same channel simultaneously without collisions.
Marathe, Madhav   +4 more
core  

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