4 citations · 9 across the 12 of their papers we have counts for
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math.DS2012
Weak instability of Hamiltonian equilibria
Gaetano Zampieri
This is an expository paper on Lyapunov stability of equilibria of autonomous Hamiltonian systems. Our aim is to clarify the concept of weak instability, namely instability without…
math.DS2012
Global isochronous potentials
Gianluca Gorni, Gaetano Zampieri
We present a geometric characterization of the nonlinear smooth functions for which the origin is a global isochronous center for the scalar equation .…
math.DS2012
Nonholonomic versus vakonomic dynamics
Gaetano Zampieri
The main aim of the present paper is to raise the doubt that vakonomic dynamics may not be satisfactory as a model for velocity dependent constraints.