Results 11 to 20 of about 9,271 (238)

Contraction Bidimensionality of Geometric Intersection Graphs [PDF]

open access: yesAlgorithmica, 2022
Given a graph $G$, we define ${\bf bcg}(G)$ as the minimum $k$ for which $G$ can be contracted to the uniformly triangulated grid $Γ_{k}$. A graph class ${\cal G}$ has the SQG${\bf C}$ property if every graph $G\in{\cal G}$ has treewidth $\mathcal{O}({\bf bcg}(G)^{c})$ for some $1\leq c<2$. The SQG${\bf C}$ property is important for algorithm design
Baste, Julien, Thilikos, Dimitrios M.
openaire   +5 more sources

Fixed points for fuzzy quasi-contractions in fuzzy metric spaces endowed with a graph

open access: yesApplied General Topology, 2020
In this paper, we introduce the notion of G-fuzzy H-quasi-contractions using directed graphs in the setting of fuzzy metric spaces endowed with a graph and we show that this new type of contraction generalizes a large number of different types of ...
Mina Dinarvand
doaj   +1 more source

A Custom-Made Lower Limb Dynamometer for Assessing Ankle Joint Torque in Humans: Calibration and Measurement Procedures

open access: yesSensors, 2021
Custom-made dynamometry was shown to objectively analyze human muscle strength around the ankle joint with accuracy, easy portability and low costs. This paper describes the full method of calibration and measurement setup and the measurement procedure ...
Iulia Iovanca Drăgoi   +8 more
doaj   +1 more source

Distance-Preserving Graph Contractions [PDF]

open access: yesSIAM Journal on Discrete Mathematics, 2019
An extended abstract of this work has appeared in the Proceedings of the 9th Innovations in Theoretical Computer Science Conference (ITCS ...
Bernstein, Aaron   +5 more
openaire   +5 more sources

Making graphs compact by lossless contraction [PDF]

open access: yesThe VLDB Journal, 2021
AbstractThis paper proposes a scheme to reduce big graphs to small graphs. It contracts obsolete parts and regular structures into supernodes. The supernodes carry a synopsis $$S_\mathcal {Q}$$ S Q for each query class $$\mathcal {Q}$$ Q
Wenfei Fan   +3 more
openaire   +2 more sources

Contracting Graphs to Paths and Trees [PDF]

open access: yesAlgorithmica, 2012
Vertex deletion and edge deletion problems play a central role in Parameterized Complexity. Examples include classical problems like Feedback Vertex Set, Odd Cycle Transversal, and Chordal Deletion. Interestingly, the study of edge contraction problems of this type from a parameterized perspective has so far been left largely unexplored.
Pinar Heggernes   +4 more
openaire   +4 more sources

Role of Chemically Magnetized Nanofluid Flow for Energy Transition over a Porous Stretching Pipe with Heat Generation/Absorption and Its Stability

open access: yesMathematics, 2023
The laminar movement in an expanding and contracting permeable pipe or surface has recently attracted the attention of many scholars owing to its application in engineering and biological processes.
Zeeshan   +4 more
doaj   +1 more source

Off-shell extended graphic rule and the expansion of Berends-Giele currents in Yang-Mills theory

open access: yesJournal of High Energy Physics, 2022
Tree-level color-ordered Yang-Mills (YM) amplitudes can be decomposed in terms of (n − 2)! bi-scalar (BS) amplitudes, whose expansion coefficients form a basis of Bern-Carrasco-Johansson (BCJ) numerators.
Konglong Wu, Yi-Jian Du
doaj   +1 more source

The finding and researching algorithm for potentially oscillating enzymatic systems

open access: yesВавиловский журнал генетики и селекции, 2021
Many processes in living organisms are subject to periodic oscillations at different hierarchical levels of their organization: from molecular-genetic to population and ecological. Oscillatory processes are responsible for cell cycles in both prokaryotes
T. N. Lakhova   +3 more
doaj   +1 more source

Contraction of Measures on Graphs [PDF]

open access: yesPotential Analysis, 2014
Given a finitely supported probability measure μ on a connected graph G, we construct a family of probability measures interpolating the Dirac measure at some given point o ∈ G and μ. Inspired by Sturm-Lott-Villani theory of Ricci curvature bounds on measured length spaces, we then study the convexity of the entropy functional along such interpolations.
openaire   +2 more sources

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