#
SPT 96

**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*

__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 Poincare'-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 Poincare' 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 Painleve' 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"

*The following partecipants delivered a talk but did not submit a
contribution for the proceedings:*

__A. Degasperis, L.A. Ibort, S. Manakov, A. Neishtadt, N.N. Nekhoroshev,
G. Tondo, and R. Yamilov.__