#
SYMMETRY AND PERTURBATION THEORY

Workshop - Torino 15-20/12/1996

###
Proceedings edited by D. Bambusi and G. Gaeta

Published by Consiglio
Nazionale delle Ricerche as

"Quaderno GNFM-CNR
n.54", Roma 1998

*List of papers*

**F. Avanzini and D. Bambusi,** *"Stability properties in hamiltonian
perturbations of resonant PDE's with symmetry: the case of NLS"*

**A. Carati,** *"A lagrangian formulation for the Abraham-Lorentz-Dirac
equation"*

**G. Cicogna,** *"On the convergence of Poincaré-Birkhoff
normalizing transfomation in the presence of symmetries"*

**A. Delshams and R. Ramirez-Ros,** *"Homoclinic orbits of twist
maps and billiards"*

**A. Doliwa and P. Santini,** *"Quadrilateral and circular lattices
are integrable"*

**G. Gaeta,** *"Renormalization of Poincaré normal forms"*

**M. Giordano, G. Marmo and A. Simoni,** *"Dynamical systems and
back-ground structures"*

**T. Kappeler and M. Makarov,** *"On the symplectic foliation induced
by the second Poisson bracket for KdV"*

**M. Mazzocco,** *"A brief survey on the algebraic solutions of
a particular case of the Painlevé VI equation"*

**V.M. Rothos and T. Bountis,** *"Persistence of homoclinic orbits
in a discretized NLS equation with hamiltonian perturbation"*

**S. Ruffo,** *"The Fermi-Pasta-Ulam-Tsingou numerical experiment:
time-scales for the relaxation to thermodynamical equilibrium"*

**G. Sartori and G. Valente,** *"Determination of the orbit space
of non-coregular compact linear groups with one relation among the basic
polynomial invariants in the P-matrix approach"*

**F. Verhulst,** *"Symmetry and integrability in hamiltonian normal
form"*