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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

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math.DS2026

Morse Index, Stability and Spectral Bounds for Periodic Orbits in Reversible Lagrangian Systems

Alessandro Portaluri, Li Wu

We prove quantitative stability and instability estimates for reversible periodic solutions of strictly Legendre-convex Lagrangian systems. If the configuration dimension is , t…

nlin.SI2026

Canonical separating coordinates in the generalized cubic Hénon-Heiles systems

Alessandro Portaluri, Nicola Sottocornola

We study the three classical integrable generalized cubic Hénon--Heiles systems -- Kaup--Kupershmidt, KdV, and Sawada--Kotera -- from the viewpoint of bi-Hamiltonian geometry a…