On commuting circle mappings and simultaneous Diophantine approximations.
On quadratic symplectic mappings.
On the persistence of pseudo-holomorphic curves on an almost complex torus (with an appendix by Jügen Pöschel).
The Order of a Singularity in Fuchs' Theory.
An example of a Schroedinger equation with almost periodic potential and nowhere dense spectrum.
Minimal solutions of variational problems on a torus
A rapidly convergent iteration method and non-linear differential equations = II
A rapidly convergent iteration method and non-linear partial differential equations - I
An extension of a result by Dinaburg and Sinai on quasi-periodic potentials.
On a partial differential equation involving the jacobian determinant
Dynamical systems -- past and present.
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