Results 1 to 10 of about 152,876 (108)

Saturation problems in the Ramsey theory of graphs, posets and point sets [PDF]

open access: greenEuropean Journal of Combinatorics, 2021
In 1964, Erd s, Hajnal and Moon introduced a saturation version of Tur n's classical theorem in extremal graph theory. In particular, they determined the minimum number of edges in a $K_r$-free, $n$-vertex graph with the property that the addition of any further edge yields a copy of $K_r$. We consider analogues of this problem in other settings.
Gábor Damásdi   +7 more
  +8 more sources

An Adaptive and Bounded Controller for Formation Control of Multi-Agent Systems with Communication Break

open access: yesApplied Sciences, 2022
Aiming at maneuvering, input saturation, and communication interference in the controller design for formation control multi-agent systems, a novel nonlinear bounded controller is proposed.
Zhigang Xiong   +3 more
doaj   +1 more source

Utilizing m-Polar Fuzzy Saturation Graphs for Optimized Allocation Problem Solutions

open access: yesMathematics, 2023
It is well known that crisp graph theory is saturated. However, saturation in a fuzzy environment has only lately been created and extensively researched. It is necessary to consider m components for each node and edge in an m-polar fuzzy graph.
Abdulaziz M. Alanazi   +4 more
doaj   +1 more source

Couple-Group Consensus for First Order Discrete-Time Multiagent Systems With Competition-Cooperation and Input Saturation Constraints

open access: yesIEEE Access, 2021
Collaborative consensus control of multiagent systems has become an important research topic in the field of artificial intelligence in recent years. This paper deals with the couple-group consensus for the first order discrete-time systems with input ...
Qi Han   +6 more
doaj   +1 more source

Triangles in Ks-saturated graphs with minimum degree t

open access: yesTheory and Applications of Graphs, 2020
For $n \geq 15$, we prove that the minimum number of triangles in an $n$-vertex $K_4$-saturated graph with minimum degree 4 is exactly $2n-4$, and that there is a unique extremal graph.
Craig Timmons   +3 more
doaj   +1 more source

Underwater Image Enhancement Based on the Improved Algorithm of Dark Channel

open access: yesMathematics, 2023
Enhancing underwater images presents a challenging problem owing to the influence of ocean currents, the refraction, absorption and scattering of light by suspended particles, and the weak illumination intensity.
Dachang Zhu
doaj   +1 more source

Terminal Impact Time Control Cooperative Guidance Law for UAVs under Time-Varying Velocity

open access: yesDrones, 2021
Aiming at the problem that multiple Unmanned Aerial Vehicles (UAVs) attack the stationary target cooperatively under time-varying velocity, the cooperative guidance law with finite time convergence on two-dimensional plan and the three-dimensional ...
Zhanyuan Jiang   +3 more
doaj   +1 more source

Social Network Analysis and Churn Prediction in Telecommunications Using Graph Theory

open access: yesEntropy, 2020
Due to telecommunications market saturation, it is very important for telco operators to always have fresh insights into their customer’s dynamics. In that regard, social network analytics and its application with graph theory can be very useful. In this
Stefan M. Kostić   +2 more
doaj   +1 more source

Constraint impulsive consensus of nonlinear multi-agent systems with impulsive time windows

open access: yesAIMS Mathematics, 2020
In this paper, the constraint impulsive consensus problem of nonlinear multi-agent systems in directed network is discussed. Impulsive time windows are designed for solving consensus problem of multi-agent systems.
Qiangqiang Zhang   +3 more
doaj   +1 more source

Application of spectral graph theory on the enthalpy change of formation of acyclic saturated ketones

open access: yesJournal of the Serbian Chemical Society, 2018
The dependence of the enthalpy change of formation of saturated acyclic ketones on molecular structure (the number of carbon atoms, the position of the carbonyl group, and the branching of the molecules) was investigated. For this purpose, a simple computational model, the parameterization of which is based on spectral graph theory, was developed.
Ana Gligorijevic   +3 more
openaire   +5 more sources

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