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Depósito Digital de Documentos de la UAB Encontrados 12 registros  1 - 10siguiente  ir al registro: La búsqueda tardó 0.00 segundos. 
1.
13 p, 959.5 KB Symmetric Phase Portraits of Homogeneous Polynomial Hamiltonian Systems of Degree 1, 2, 3, 4, and 5 with Finitely Many Equilibria / Benterki, Rebiha (University Mohamed El Bachir El Ibrahimi. Department of Mathematics) ; Llibre, Jaume (Universitat Autònoma de Barcelona. Departament de Matemàtiques)
Roughly speaking, the Poincaré disc D2 is the closed disc centered at the origin of the coordinates of R2, where the whole of R2 is identified with the interior of D2 and the circle of the boundary of D2 is identified with the infinity of R2, because in the plane R2, we can go to infinity in as many directions as points have the circle. [...]
2023 - 10.3390/sym15081476
Symmetry, Vol. 15, Issue 8 (August 2023) , art. 1476  
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2.
28 p, 6.2 MB Generalized Cyclic p-Contractions and p-Contraction Pairs Some Properties of Asymptotic Regularity Best Proximity Points, Fixed Points / De la Sen, Manuel (Universidad del País Vasco. Departamento de Electricidad y Electrónica) ; Ibeas, Asier (Universitat Autònoma de Barcelona. Departament de Telecomunicació i Enginyeria de Sistemes)
This paper studies a general (Formula presented. ) -contractive condition of a self-mapping (Formula presented. ) on (Formula presented. ), where (Formula presented. ) is either a metric space or a dislocated metric space, which combines the contribution to the upper-bound of (Formula presented. [...]
2022 - 10.3390/sym14112247
Symmetry, Vol. 14, Issue 11 (November 2022) , art. 2247  
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3.
16 p, 1.6 MB Differential Impact of Forest Fragmentation on Fluctuating Asymmetry in South Amazonian Small Mammals / Castilheiro, W. F. F. (Universidade de Lisboa. Departamento de Biologia) ; Muñoz Muñoz, Francesc (Universitat Autònoma de Barcelona. Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia) ; Ventura Queija, Jacinto (Universitat Autònoma de Barcelona. Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia) ; Santos-Filho, Manoel Dos (Universidade do Estado de Mato Grosso) ; Mathias, Maria da Luz (Universidade de Lisboa. Departamento de Biologia) ; Gabriel, Sofia I. (Universidade de Aveiro. Departamento de Biologia)
(1) Background: Southern Amazonia encompasses some of the most human-impacted and deforested regions of South America, resulting in a hyper-fragmented landscape. In this context, by using a geometric morphometrics approach, we aimed to examine the effect of forest fragmentation on developmental instability (DI) of the mandible, assessed by variation of fluctuating asymmetry (FA), in four neotropical small mammal species inhabiting the municipality of Alta Floresta (Brazil). [...]
2022 - 10.3390/sym14050981
Symmetry, Vol. 14, Issue 5 (May 2022) , art. 981  
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4.
10 p, 884.5 KB Brain symmetry in alpha band when watching cuts in movies / Andreu Sánchez, Celia (Universitat Autònoma de Barcelona. Departament de Comunicació Audiovisual i Publicitat) ; Martín-Pascual, Miguel Ángel (Universitat Autònoma de Barcelona. Departament de Comunicació Audiovisual i Publicitat) ; Gruart i Massó, Agnès (Universidad Pablo de Olavide. División de Neurociencias) ; Delgado-García, José María (Universidad Pablo de Olavide. División de Neurociencias)
The purpose of this study is to determine if there is asymmetry in the brain activity between both hemispheres while watching cuts in movies. We presented videos with cuts to 36 participants, registered electrical brain activity through electroencephalography (EEG) and analyzed asymmetry in frontal, somatomotor, temporal, parietal and occipital areas. [...]
2022 - 10.3390/sym14101980
Symmetry, Vol. 14 Núm. 10 (october 2022) , art. 1980  
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5.
10 p, 294.1 KB Limit cycles of planar piecewise differential systems with linear Hamiltonian saddles / Llibre, Jaume (Universitat Autònoma de Barcelona. Departament de Matemàtiques) ; Valls, Clàudia 1973- (Universidade de Lisboa. Instituto Superior Técnico. Departamento de Matemàtica)
We provide the maximum number of limit cycles for continuous and discontinuous planar piecewise differential systems formed by linear Hamiltonian saddles and separated either by one or two parallel straight lines. [...]
2021 - 10.3390/sym13071128
Symmetry, Vol. 13, Issue 7 (July 2021) , art. 1128
2 documentos
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6.
21 p, 420.4 KB Integrability and limit cycles via first integrals / Llibre, Jaume (Universitat Autònoma de Barcelona. Departament de Matemàtiques)
In many problems appearing in applied mathematics in the nonlinear ordinary differential systems, as in physics, chemist, economics, etc. , if we have a differential system on a manifold of dimension, two of them having a first integral, then its phase portrait is completely determined. [...]
2021 - 10.3390/sym13091736
Symmetry, Vol. 13, Issue 9 (September 2021) , art. 1736  
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7.
33 p, 4.0 MB On confinement and quarantine concerns on an seiar epidemic model with simulated parameterizations for the covid-19 pandemic / De la Sen, Manuel (Universidad del País Vasco. Instituto de Investigación y Desarrollo de Procesos) ; Ibeas, Asier (Universitat Autònoma de Barcelona. Departament de Telecomunicació i Enginyeria de Sistemes) ; Agarwal, Ravi P. (Texas A & M University. Department of Mathematics)
This paper firstly studies an SIR (susceptible-infectious-recovered) epidemic model without demography and with no disease mortality under both total and under partial quarantine of the susceptible subpopulation or of both the susceptible and the infectious ones in order to satisfy the hospital availability requirements on bed disposal and other necessary treatment means for the seriously infectious subpopulations. [...]
2020 - 10.3390/sym12101646
Symmetry, Vol. 12, Issue 10 (October 2020) , art. 1646  
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8.
15 p, 5.3 MB UAV group formation collision avoidance method based on second-order consensus algorithm and improved artificial potential field / Tang, Jun (National University of Defense Technology. College of systems engineering (Xina)) ; Lao, Songyang (National University of Defense Technology. College of systems engineering (Xina)) ; Huang, Yang (National University of Defense Technology. College of systems engineering (Xina))
The problem of collision avoidance of an unmanned aerial vehicle (UAV) group is studied in this paper. A collision avoidance method of UAV group formation based on second-order consensus algorithm and improved artificial potential field is proposed. [...]
2019 - 10.3390/sym11091162
Symmetry, Vol. 11 (2019) , p. 1-15  
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9.
42 p, 7.5 MB On a SIR model in a patchy environment under constant and feedback decentralized controls with asymmetric parameterizations / De la Sen, Manuel (Universidad del País Vasco. Instituto de Investigación y Desarrollo de Procesos) ; Ibeas, Asier (Universitat Autònoma de Barcelona. Departament de Telecomunicació i Enginyeria de Sistemes) ; Alonso-Quesada, Santiago (Universidad del País Vasco. Instituto de Investigación y Desarrollo de Procesos) ; Nistal, Raul (Universidad del País Vasco. Instituto de Investigación y Desarrollo de Procesos)
This paper presents a formal description and analysis of an SIR (involving susceptibleinfectious- recovered subpopulations) epidemic model in a patchy environment with vaccination controls being constant and proportional to the susceptible subpopulations. [...]
2019 - 10.3390/sym11030430
Symmetry, Vol. 11, Issue 3 (March 2019) , art. 430  
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10.
38 p, 776.1 KB Darboux Integrals for Schrödinger planar vector fields via Darboux transformations / Acosta-Humánez, Primitivo B. (Universidad del Norte (Colombia). Departamento de Matemáticas y Estadística) ; Pantazi, Chara (Universitat Politècnica de Catalunya. Departament de Matemàtica Aplicada I)
In this paper we study the Darboux transformations of planar vector fields of Schrödinger type. Using the isogaloisian property of Darboux transformation we prove the "invariance" of the elements of the "Darboux Theory of Integrability". [...]
2012
SIGMA. Symmetry, Integrability and Geometry. Methods and Applications, Vol. 8 (2012) , p. 26 pages  
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Depósito Digital de Documentos de la UAB : Encontrados 12 registros   1 - 10siguiente  ir al registro:
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