Zobrazeno 1 - 10
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pro vyhledávání: '"Llibre, A"'
Autor:
Llibre, J., Murza, Adrian C.
We extend to the $n$-dimensional ellipsoid contained in $\R^{n+1},$ the Darboux theory of integrability for polynomial vector fields in the $n$-dimensional sphere (Llibre et al., 2018). New results on the maximum number of invariant parallels and mer
Externí odkaz:
http://arxiv.org/abs/2410.21336
Autor:
Llibre, Jaume, Santana, Paulo
In this paper we study the family of planar hybrid differential systems formed by two linear centers and a polynomial reset map of any degree. We study their limit cycles and also provide examples of these hybrid systems exhibiting chaotic dynamics.
Externí odkaz:
http://arxiv.org/abs/2407.05151
We study the classical planar two-center problem of a particle $m$ subjected to harmonic-like interactions with two fixed centers. For convenient values of the dimensionless parameter of this problem we use the averaging theory for showing analytical
Externí odkaz:
http://arxiv.org/abs/2405.15048
Autor:
da Cruz, Leonardo P. C., LLibre, Jaume
A center of a differential system in the plane $\mathbb{R}^2$ is an equilibrium point $p$ having a neighborhood $U$ such that $U\setminus \{p\}$ is filled of periodic orbits. A center $p$ is global when $\mathbb{R}^2\setminus \{p\}$ is filled of peri
Externí odkaz:
http://arxiv.org/abs/2312.05709
Publikováno v:
9th International Conference on Recent Advances in Aerospace Actuation Systems and Components (R3ASC'23), Sep 2023, Toulouse, France
The torque motor is the most common technology used in electrohydraulic two-stage servovalves to drive the hydraulic pilot stage. As it is a key component in these valves, its performance considerably affects the overall performance of servovalve sys
Externí odkaz:
http://arxiv.org/abs/2310.11076
Autor:
Llibre, Jaume, Rondón, Gabriel
A difficult classical problem in the qualitative theory of differential systems in the plane $\mathbb{R}^2$ is the center-focus problem, i.e. to distinguish between a focus and a center. Another difficult problem is to distinguish inside a family of
Externí odkaz:
http://arxiv.org/abs/2310.07454
Autor:
Anna Hofmann, Lisa M. Häsler, Marius Lambert, Stephan A. Kaeser, Susanne Gräber-Sultan, Ulrike Obermüller, Elke Kuder-Buletta, Christian la Fougere, Christoph Laske, Jonathan Vöglein, Johannes Levin, Nick C. Fox, Natalie S. Ryan, Henrik Zetterberg, Jorge J. Llibre-Guerra, Richard J. Perrin, Laura Ibanez, Peter R. Schofield, William S. Brooks, Gregory S. Day, Martin R. Farlow, Ricardo F. Allegri, Patricio Chrem Mendez, Takeshi Ikeuchi, Kensaku Kasuga, Jae-Hong Lee, Jee Hoon Roh, Hiroshi Mori, Francisco Lopera, Randall J. Bateman, Eric McDade, Brian A. Gordon, Jasmeer P. Chhatwal, Mathias Jucker, Stephanie A. Schultz, Dominantly Inherited Alzheimer Network
Publikováno v:
Nature Communications, Vol 15, Iss 1, Pp 1-10 (2024)
Abstract Disease-modifying therapies for Alzheimer’s disease (AD) are likely to be most beneficial when initiated in the presymptomatic phase. To track the benefit of such interventions, fluid biomarkers are of great importance, with neurofilament
Externí odkaz:
https://doaj.org/article/0a454b50306942c5b151db45a71682b3
Autor:
Fernando Chacón, Luis Morano, Jordi Navarro, Rafael Granados, Josep Mª Llibre, Pablo Ryan, Teresa Aldámiz-Echevarria, Luz Martín Carbonero, Marc Puigvehí, Imma Clotet-Codina, Nuria Sanchez-Vega, Enrique Vacas, Oscar Rincón, Juan Berenguer, Javier Crespo, Carlos Roncero
Publikováno v:
BMC Public Health, Vol 24, Iss 1, Pp 1-10 (2024)
Abstract Background Hepatitis C virus (HCV) reinfection following successful treatment threatens the achievement of HCV elimination. The primary aim of this study is to assess reinfection rate three years after sustained virologic response (SVR) in p
Externí odkaz:
https://doaj.org/article/8b8343c884894a8090d0c57af0718ffc
Publikováno v:
Chaos, 2023
The generalized Chazy differential equation corresponds to the following two-parameter family of differential equations \begin{equation*}\label{gcdeq} \dddot x+|x|^q \ddot x+\dfrac{k |x|^q}{x}\dot x^2=0, \end{equation*} which has its regularity varyi
Externí odkaz:
http://arxiv.org/abs/2307.00087
Publikováno v:
Electronic Journal of Differential Equations, Vol 2024, Iss 50,, Pp 1-38 (2024)
Externí odkaz:
https://doaj.org/article/917d5a89067f422d9ce461d2beba7079