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An algebraic model of graded calculus of variations

  • B. A. Kupershmidt (a1)
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The modern theory of integrable systems rests on two fundamental pillars: the classification of Lax [13] and zero-curvature equations [14, 1, 2]; and algebraic models of the classical calculus of variations [9,5] specialized to the residue calculus in modules of differential forms over rings of matrix pseudo-differential operators [9, 6]. Both these aspects of the theory are by now very well understood for integrable systems in one space dimension.

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[1]Drinfel'd, V. G. and Sokolov., V. V.Korteweg-de Vries equations and simple Lie algebras. Dokl. Akad. Nauk SSSR 258 (1981), 1116 (Russian); Soviet Math. Dokl. 23 (1981), 457–462 (English).
[2]Drinfel'd, V. G. and Sokolov., V. V.Lie algebras and the Korteweg-de Vries type equations. Itogi Nauki i Tekhniki, ser. Sovremennye Problemi Mathematiki, 24 (1984), 81180 (Russian); J. Sov. Math. 30 (1985), 1975–2036 (English).
[3]Gel'fand, I. M. and Dikii., L. A.Asymptotic behaviour of the resolvent of Sturm-Liouville equations and the algebra of the Korteweg-de Vries equations. Uspekhi Mat. Nauk (5) 30 (1975), 67100; Russian Math. Surveys (5) 30 (1975), 77–113.
[4]Kupershmidt., B. A. Geometry of jet bundles and the structures of Lagrangian and Hamiltonian formalisms. Lect. Notes in Math. vol. 775 (Springer-Verlag, 1980), 162218.
[5]Kupershmidt., B. A.Discrete Lax Equations and Differential-Difference Calculus. Astérisque 123 (1985).
[6]Kupershmidt, B. A. and Wilson., G.Modifying Lax equations and the second Hamiltonian structure. Invent. Math. 62 (1981), 403436.
[7]Leites., D. A.Introduction to Supermanifolds. Uspekhi Mat. Nauk (1) 35 (1980), 357.
[8]Leites., D. A.Theory of Supermanifolds. Petrozavodsk (1983) (in Russian).
[9]Manin., Yu. I.Algebraic aspects of non-linear differential equations. Itogi Nauki i Tekhniki, ser. Sovremennye Problemi Mathematiki 11 (1978), 5152 (Russian); J. Soviet Math. 11 (1979), 1–122 (English).
[10]Manin, Yu. I.Holomorphic supergeometry and Yang-Mills superfields. Itogi Nauki i Tekhniki, ser. Sovremennye Problemi Mathematiki 24 (1984), 3180 (in Russian).
[11]Manin, Yu. I. and Radul., A. O.A supersymmetric extension of the Kadomtsev-Petviashvili hierarchy. Comm. Math. Phys. 98 (1985), 6577.
[12]Rogers., A. Integration of supermanifolds. In Mathematical Aspects of Superspace, ed. Seifert, H–J. et al. (Reidel, D., 1984), pp. 149160.
[13]Wilson, G., Commuting flows and conservation laws for Lax equations. Math. Proc. Cambridge Philos Soc. 86 (1979), 131143.
[14]Wilson., G.The modified Lax and two-dimensional Toda lattice equations associated with simple Lie algebras. Erogodic Theory and Dynamical Systems 1 (1981), 361380.
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Mathematical Proceedings of the Cambridge Philosophical Society
  • ISSN: 0305-0041
  • EISSN: 1469-8064
  • URL: /core/journals/mathematical-proceedings-of-the-cambridge-philosophical-society
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