Aratyn, H.Ferreira, L. A.Zimerman, A. H.2014-05-272014-05-271994-12-01Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, v. 327, n. 3-4, p. 266-273, 1994.0370-2693http://hdl.handle.net/11449/64504We show that the multi-boson KP hierarchies possess a class of discrete symmetries linking them to discrete Toda systems. These discrete symmetries are generated by the similarity transformation of the corresponding Lax operator. This establishes a canonical nature of the discrete transformations. The spectral equation, which defines both the lattice system and the corresponding Lax operator, plays a key role in determining pertinent symmetry structure. We also introduce the concept of the square root lattice leading to a family of new pseudo-differential operators with covariance under additional Bäcklund transformations.266-273engArtigo10.1016/0370-2693(94)90727-7Acesso restrito2-s2.0-00423188308215976645016606