Abstract
Many questions in singularity theory (for instance, the classification of the singularities of caustics and wave fronts, and also the investigation of the various singularities in optimization and variational calculus problems) become understandable only within the framework of the geometry of symplectic and contact manifolds, which is refreshingly unlike the usual geometries of Euclid, Lobachevskij and Riemann.
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Bibliographical Comments
The theory of singularities of Lagrangian mappings started in 1966. See:
A Lagrangian equivalence between two Lagrangian singularities is a mapping of the first Lagrangian fibration to the second which maps fibres onto fibres, takes the first symplectic structure into the second and carries the first Lagrangian submanifold into the second.
V. I. Arnol’d: Characteristic class entering in quantization conditions. Funkts. Anal. Prilozh. 1:1 (1967), 1–14 (English translation: Funct. Anal. Appl. 1 (1967), 1-13).
L. Hörmander: Fourier integral operators, I. Acta Math. 127 (1971), 79–183.
V. I. Arnol’d: Integrals of rapidly oscillating functions and singularities of projections of Lagrangian manifolds. Funkts. Anal. Prilozh. 6:3 (1972), 61–62 (English translation: Funct. Anal. Appl. 6 (1972), 222-224).
V. I. Arnol’d: Normal forms for functions near degenerate critical points, the Weyl groups of A k, D k, E k and Lagrangian singularities. Funkts. Anal. Prilozh. 6:4 (1972), 3–25 (English translation: Funct. Anal. Appl. 6 (1972), 254-272).
See also:
J. Guckenheimer: Catastrophes and partial differential equations. Ann. Inst. Fourier 23, 2 (1973), 31–59.
The Legendre singularities theory was published in 1974 in the Russian edition of:
V. I. Arnol’d: Mathematical Methods of Classical Mechanics. Nauka, Moscow 1974 (English translation: Graduate Texts in Mathematics 60, Springer-Verlag, New York-Heidelberg-Berlin 1978).
V. I. Arnol’d: Critical points of smooth functions, in: Proceedings of the International Congress of Mathematicians (Vancouver, 1974) vol. 1. Canadian Mathematical Congress 1975, pp. 19–39.
See also:
M. J. Sewell: On Legendre transformations and elementary catastrophes. Math. Proc. Camb. Philos. Soc. 82 (1977), 147–163.
J.-G. Dubois, J.-P. Dufour: La théorie des catastrophes. V. Transformées de Legendre et thermodynamique. Ann. Inst. Henri Poincaré, Nouv. Ser., Sect. A 29 (1978), 1–50.
For the open swallowtail, see:
V. I. Arnol’d: Lagrangian manifolds with singularities, asymptotic rays, and the open swallowtail. Funkts. Anal. Prilozh. 15:4 (1981), 1–14 (English translation: Funct. Anal. Appl. 15 (1981), 235-246).
V. I. Arnol’d: Singularities of Legendre varieties, of evolvents and of fronts at an obstacle, Ergodic Theory Dyn. Syst. 2 (1982), 301–309.
A. B. Givental’: Lagrangian varieties with singularities and irreducible sl2-modules. Usp. Mat. Nauk 38:6 (1983), 109–110 (English translation: Russ. Math. Surv. 38:6 (1983), 121-122).
A. B. Givental’: Varieties of polynomials having a root of fixed co-multiplicity and the generalized Newton equation. Funkts. Anal. Prilozh. 16:1 (1982), 13–18 (English translation: Manifolds of polynomials having a root of fixed multiplicity, and the generalized Newton equation. Funct. Anal. Appl. 16 (1982), 10-14).
The Givental’ theorem on submanifolds of symplectic and contact spaces first appears in the 1981 Russian edition of the present booklet. It is a generalization of the Darboux-Weinstein theorem (the difference being that Givental' requires no information on transverse vectors). The Darboux-Weinstein theorem is proved in :
A. Weinstein: Lagrangian submanifolds and hamiltonian systems. Ann. Math., II. Ser. 98 (1973), 377–410.
V. I. Arnol’d, A. B. Givental’: Symplectic geometry (in Russian), in: Itogi Nauki Tekh., Ser. Sovrem. Probl. Mat, Fundamental’nye na-pravleniya (Contemporary Problems of Mathematics, Fundamental directions) 4, Viniti, Moscow 1985 (to be translated by Springer-Verlag).
V. I. Arnol’d: Singularities in variational calculus, in: Itogi Nauki Tekh., Ser. Sovrem. Probl. Mat. (Contemporary Problems of Mathematics) 22, Viniti, Moscow 1983, pp. 3–55 (English translation: J. Sov. Math. 27 (1984), 2679-2713).
R. B. Melrose: Equivalence of glancing hypersurfaces. Invent. Math. 37 (1976), 165–191.
R. B. Melrose: Equivalence of glancing hypersurfaces. II. Math. Ann. 255 (1981), 159–198.
J. Martinet: Sur les singularités des formes différentielles. Ann. Inst. Fourier, 20, 1 (1970), 95–178.
R. Roussarie: Modèles locaux de champs et de formes. Astérisque 30 (1975).
M. Golubitsky, D. Tischler: An example of moduli for singular symplectic forms. Invent. Math. 38 (1977), 219–225.
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© 1986 Springer-Verlag Berlin Heidelberg
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Arnold, V.I. (1986). Symplectic and Contact Geometry. In: Catastrophe Theory. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-96937-9_14
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DOI: https://doi.org/10.1007/978-3-642-96937-9_14
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