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math.DG2004
Remark on a conjecture of conformal transformations of Riemannian manifolds
A. Raouf Chouikha
Ejiri gave a negative answer to a conjecture of Lichnerowicz concerning Riemannian manifolds with constant scalar curvature admitting an infinitesimal non isometric conformal trans…
math.DS2004
Isochronous Centers of Lienard Type Equations and Applications
A. Raouf Chouikha
In this work we study the equation with a center at 0 and investigate conditions of its isochronicity. When and are analytic (not n…