Zobrazeno 1 - 10
of 163
pro vyhledávání: '"Calamai Alessandro"'
Publikováno v:
Open Mathematics, Vol 22, Iss 1, Pp 1733-1742 (2024)
We investigate third-order strongly nonlinear differential equations of the type (Φ(k(t)u″(t)))′=f(t,u(t),u′(t),u″(t)),a.e. on[0,T],\left(\Phi \left(k\left(t){u}^{^{\prime\prime} }\left(t)))^{\prime} =f\left(t,u\left(t),u^{\prime} \left(t),{
Externí odkaz:
https://doaj.org/article/6ee16f093b9541c0a107fc090fdf2791
This article is devoted to the study of a $2$-dimensional piecewise smooth (but possibly) discontinuous dynamical system, subject to a non-autonomous perturbation; we assume that the unperturbed system admits a homoclinic trajectory $\vec{\gamma}(t)$
Externí odkaz:
http://arxiv.org/abs/2411.01181
Autor:
Calamai, Alessandro, Infante, Gennaro
We investigate the existence of nontrivial solutions of parameter-dependent elliptic equations with deviated argument in annular-like domains in $\mathbb{R}^{n}$, with $n\geq 2$, subject to functional boundary conditions. In particular we consider a
Externí odkaz:
http://arxiv.org/abs/2410.11615
Publikováno v:
Advances in Nonlinear Analysis, Vol 10, Iss 1, Pp 684-706 (2020)
We study boundary value problems associated with singular, strongly nonlinear differential equations with functional terms of type
Externí odkaz:
https://doaj.org/article/f3895ec33083442583e85cb01e5817d7
Publikováno v:
Advanced Nonlinear Studies, Vol 20, Iss 4, Pp 911-931 (2020)
We discuss, by topological methods, the solvability of systems of second-order elliptic differential equations subject to functional boundary conditions under the presence of gradient terms in the nonlinearities. We prove the existence of nonnegative
Externí odkaz:
https://doaj.org/article/9acd34ddb1ce4b289ac596341e73366b
Publikováno v:
Advanced Nonlinear Studies, Vol 19, Iss 1, Pp 149-163 (2019)
We study global continuation properties of the set of T-periodic solutions of parameterized second order delay differential equations with constant time lag on smooth manifolds. We apply our results to get multiplicity of T-periodic solutions. Our to
Externí odkaz:
https://doaj.org/article/e851a686c5fc4550a53ec7e6fc7a8580
Publikováno v:
Mediterr. J. Math. 21, 149 (2024)
By means of fixed point index theory for multi-valued maps, we provide an analogue of the classical Birkhoff--Kellogg Theorem in the context of discontinuous operators acting on affine wedges in Banach spaces. Our theory is fairly general and can be
Externí odkaz:
http://arxiv.org/abs/2401.16050
Autor:
Calamai, Alessandro, Infante, Gennaro
By means of a recent Birkhoff-Kellogg type theorem set in affine cones, we discuss the solvability of a parameter-dependent thermostat problem subject to deviated arguments. We illustrate in a specific example the constants that occur in our theory.<
Externí odkaz:
http://arxiv.org/abs/2302.12795
Autor:
Calamai, Alessandro, Infante, Gennaro
Publikováno v:
Discrete and Continuous Dynamical Systems - S, 2024, 17(5&6): 2009-2020
By means of a recent Birkhoff-Kellogg type theorem, we discuss the solvability of a fairly general class of parameter-dependent fourth order retarded differential equations subject to functional boundary conditions. We seek solutions within a transla
Externí odkaz:
http://arxiv.org/abs/2209.04619
We study, by means of a topological approach, the forced oscillations of second order functional retarded differential equations subject to periodic perturbations. We consider a delay-type functional dependence involving a gamma probability distribut
Externí odkaz:
http://arxiv.org/abs/2205.12758