Geodesic
A new construction of recursion operators for systems of the hydrodynamic type
Teoretičeskaâ i matematičeskaâ fizika, Tome 122 (2000) no. 1, pp. 37-49

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We consider a certain class of two-dimensional systems of the hydrodynamic type that contains all examples known to us and can be associated with a class of linear wave equations possessing an algebra of ladder operators. We use this to give a simple construction of recursion operators for these systems, not always coinciding with those of Sheftel and Teshukov. 
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     author = {A. P. Fordy and T. B. G\"urel},
     title = {A new construction of recursion operators for systems of the hydrodynamic type},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
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     number = {1},
     year = {2000},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_2000_122_1_a3/}
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A. P. Fordy; T. B. Gürel. A new construction of recursion operators for systems of the hydrodynamic type. Teoretičeskaâ i matematičeskaâ fizika, Tome 122 (2000) no. 1, pp. 37-49. http://geodesic.mathdoc.fr/item/TMF_2000_122_1_a3/