A. Portaluri

activity

20022026

most citedA Morse Index Theorem and bifurcation for perturbed geodesics on Semi-Riemannian Manifolds

45 citations · 133 across the 45 of their papers we have counts for

collaborators

Showing 2021Show all

2 papers · 1 filter

math.DS2021

Linear instability of periodic orbits of free period Lagrangian systems

Alessandro Portaluri, Li Wu, Ran Yang

In this paper we provide a sufficient condition for the linear instability of a periodic orbit for a free period Lagrangian system on a Riemannian manifold. The main result establi…

math.DS2021

Spectral stability, spectral flow and circular relative equilibria for the Newtonian $n$ -body problem

Luca Asselle, Alessandro Portaluri, Li Wu

For the Newtonian (gravitational) $n$ -body problem in the Euclidean $d$ -dimensional space, $d \geq 2$ , the simplest possible periodic solutions are provided by circular relative equi…

Linear instability of periodic orbits of free period Lagrangian systems

Spectral stability, spectral flow and circular relative equilibria for the Newtonian n-body problem

Spectral stability, spectral flow and circular relative equilibria for the Newtonian $n$ -body problem