Mathematics – Analysis of PDEs
Scientific paper
1997-12-15
Comm. Math. Phys., vol 138, (1991), pp. 409-436
Mathematics
Analysis of PDEs
Scientific paper
The question of complete integrability of evolution equations associated to $n\times n$ first order isospectral operators is investigated using the inverse scattering method. It is shown that for $n>2$, e.g. for the three-wave interaction, additional (nonlinear) pointwise flows are necessary for the assertion of complete integrability. Their existence is demonstrated by constructing action-angle variables. This construction depends on the analysis of a natural 2-form and symplectic foliation for the groups GL(n) and SU(n).}
Beals Richard
Sattinger David H.
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