Zobrazeno 1 - 10
of 4 827
pro vyhledávání: '"Feltrin AS"'
We provide a new version of the Poincar\'e-Birkhoff theorem for possibly multivalued successor maps associated with planar non-autonomous Hamiltonian systems. As an application, we prove the existence of periodic and subharmonic solutions of the scal
Externí odkaz:
http://arxiv.org/abs/2410.21045
In this paper, we study the $T$-periodic solutions of the parameter-dependent $\phi$-Laplacian equation \begin{equation*} (\phi(x'))'=F(\lambda,t,x,x'). \end{equation*} Based on the topological degree theory, we present some atypical bifurcation resu
Externí odkaz:
http://arxiv.org/abs/2406.00325
The paper studies the existence of periodic solutions of a perturbed relativistic Kepler problem of the type \begin{equation*} \dfrac{\mathrm{d}}{\mathrm{d}t}\left(\frac{m\dot{x}}{\sqrt{1-|\dot{x}|^{2}/c^{2}}}\right) = -\alpha\frac{x}{|x|^{3}} + \var
Externí odkaz:
http://arxiv.org/abs/2405.11189
In this paper, we focus our attention on the positive solutions to second-order nonlinear ordinary differential equations of the form $u''+q(t)g(u)=0$, where $q$ is a sign-changing weight and $g$ is a superlinear function. We exploit the classical sh
Externí odkaz:
http://arxiv.org/abs/2405.05664
This paper explores the evolution of Radio Access Network (RAN) architectures and their integration into Non-Terrestrial Networks (NTN) to address escalating mobile traffic demands. Focusing on Low Earth Orbit (LEO) satellites as key components of NT
Externí odkaz:
http://arxiv.org/abs/2404.09186
Autor:
Tancredi, Riccardo, Feltrin, Antonio, Infirri, Giosuè Sardo, Toso, Simone, Vollmar, Leonie, Hugel, Thorsten, Baiesi, Marco
Publikováno v:
New J. Phys., 26, 073023 (2024)
Time series of conformational dynamics in proteins are usually evaluated with hidden Markov models (HMMs). This approach works well if the number of states and their connectivity is known. However, for the multi-domain protein Hsp90, a standard HMM a
Externí odkaz:
http://arxiv.org/abs/2402.19207
We investigate bifurcation of closed orbits with a fixed energy level for a class of nearly integrable Hamiltonian systems with two degrees of freedom. More precisely, we make a joint use of Moser invariant curve theorem and Poincar\'e-Birkhoff fixed
Externí odkaz:
http://arxiv.org/abs/2310.02615
Autor:
Feltrin, Guglielmo, Garrione, Maurizio
We deal with the non-autonomous parameter-dependent second-order differential equation \begin{equation*} \delta \left( \dfrac{v'}{\sqrt{1-(v')^{2}}} \right)' + q(t) f(v)= 0, \quad t\in\mathbb{R}, \end{equation*} driven by a Minkowski-curvature operat
Externí odkaz:
http://arxiv.org/abs/2309.13286
Publikováno v:
Evolutionary Systematics, Vol 8, Iss 2, Pp 199-218 (2024)
Mountainous regions typically host a great diversity of small-ranged species, often contributing for delineating world biodiversity hotspots. Species of trichomycterine catfishes have been recorded for several high-altitude areas of tropical South Am
Externí odkaz:
https://doaj.org/article/aae739ca91d84698a5a40845cf6fcdb0
Publikováno v:
Meridiana, 2024 Jan 01(109), 121-142.
Externí odkaz:
https://www.jstor.org/stable/27331357