7 citations · 16 across the 15 of their papers we have counts for
3 papers · 1 filter
On fourth order retarded equations with functional boundary conditions: a unified approach
Alessandro Calamai, Gennaro Infante
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…
Periodic perturbations of a class of scalar second order functional differential equations
Alessandro Calamai, Maria Patrizia Pera, Marco Spadini
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 de…
An affine Birkhoff--Kellogg type result in cones with applications to functional differential equations
Alessandro Calamai, Gennaro Infante
In this short note we prove, by means of classical fixed point index, an affine version of a Birkhoff--Kellogg type theorem in cones. We apply our result to discuss the solvability…