2025-03-27 16:48 |
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18 p, 1.7 MB |
Collinear Fractals and Bandt's Conjecture
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Espigule, Bernat (Universitat de Girona. Departament d'Informàtica, Matemàtica Aplicada i Estadística) ;
Juher, David (Universitat de Girona. Departament d'Informàtica, Matemàtica Aplicada i Estadística) ;
Saldaña, Joan (Universitat de Girona. Departament d'Informàtica, Matemàtica Aplicada i Estadística)
2024 - 10.3390/fractalfract8120725
Fractal and Fractional, Vol. 8, Issue 12 (December 2024) , art. 725
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2025-03-17 14:12 |
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2025-03-17 14:12 |
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2025-03-17 14:12 |
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Resource-consumer dynamics in drylands : Modeling the role of plant-plant facilitation-competition shifts with a piecewise system
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Da Cruz, Leonardo Pereira Costa (Universidade de São Paulo) ;
Torregrosa, Joan (Universitat Autònoma de Barcelona. Departament de Matemàtiques) ;
Berdugo, Miguel (Universidad Complutense de Madrid. Departamento de Biodiversidad, Ecología y Evolución) ;
Sardanyés, Josep (Centre de Recerca Matemàtica)
In drylands, water availability determines plant population densities and whether they cooperate via facilitation or compete. When water scarcity intensifies, plant densities decrease and competition for water surpasses the benefits of soil improvement by facilitator plants, involving an abrupt shift from facilitation to competition. [...]
2025 - 10.1016/j.physd.2025.134548
Physica D. Nonlinear phenomena, Vol. 473 (March 2025) , art. 134548
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2025-03-17 14:12 |
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On the cyclicity of hyperbolic polycycles
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Buzzi, Claudio (Universidade Estadual Paulista "Júlio de Mesquita Filho". Instituto de Biociências, Letras e Ciências Exatas) ;
Gasull, Armengol (Universitat Autònoma de Barcelona. Departament de Matemàtiques) ;
Santana, Paulo Henrique Reis (Universidade Estadual Paulista "Júlio de Mesquita Filho". Instituto de Biociências, Letras e Ciências Exatas)
Let X be a planar smooth vector field with a polycycle Γ with n sides and all its corners, that are at most n singularities, being hyperbolic saddles. In this paper we study the cyclicity of Γ in terms of the hyperbolicity ratios of these saddles, giving explicit conditions that ensure that it is at least k, for any k⩽n. [...]
2025 - 10.1016/j.jde.2025.02.061
Journal of differential equations, Vol. 429 (June 2025) , p. 646-677
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25 p, 1.6 MB |
The transition between two ecological limit cycles in one predator-two competitive prey model
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Castellanos, Víctor (Universidad Juárez Autónoma de Tabasco (Mèxic). División Académica de Ciencias Básicas) ;
Chan-López, Eduardo (Universidad Juárez Autónoma de Tabasco. División Académica de Ciencias Básicas (Mèxic)) ;
Llibre, Jaume (Universitat Autònoma de Barcelona. Departament de Matemàtiques)
In this paper we analyze an ecological model with a single predator and two competitive prey species. This model incorporates several key elements, including logistic growth dynamics for the prey populations, a Holling type II functional response governing predator-prey interactions, and the inclusion of intraspecific competition among predators. [...]
2024
Dynamics of continuous, discrete and impulsive systems, Vol. 31, Issue 6b (2024) , p. 377-404
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