Geodesic
Structural instability of a soliton for the Davey--Stewartson~II equation
Teoretičeskaâ i matematičeskaâ fizika, Tome 118 (1999) no. 3, pp. 354-361

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An algebraic soliton of the Davey–Stewartson II equation looses structural stability under a small perturbation of the initial data. 
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     author = {R. R. Gadyl'shin and O. M. Kiselev},
     title = {Structural instability of a soliton for the {Davey--Stewartson~II} equation},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {354--361},
     publisher = {mathdoc},
     volume = {118},
     number = {3},
     year = {1999},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1999_118_3_a4/}
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R. R. Gadyl'shin; O. M. Kiselev. Structural instability of a soliton for the Davey--Stewartson~II equation. Teoretičeskaâ i matematičeskaâ fizika, Tome 118 (1999) no. 3, pp. 354-361. http://geodesic.mathdoc.fr/item/TMF_1999_118_3_a4/