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Found 82 Documents (Results 1–82)

Equilateral triangulations of Riemann surfaces, and curves over algebraic number fields. (English. Russian original) Zbl 0697.14017

Sov. Math., Dokl. 39, No. 1, 38-41 (1989); translation from Dokl. Akad. Nauk SSSR 304, No. 2, 265-268 (1989).
Reviewer: U.Vetter
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Centroaffine invariant conditions for the existence of a center of a differential system with cubic nonlinearities. (English. Russian original) Zbl 0674.34025

Sov. Math., Dokl. 38, No. 1, 198-201 (1989); translation from Dokl. Akad. Nauk SSSR 301, No. 6, 1297-1301 (1988).
Reviewer: S.Ju.Piljugin
MSC:  34C05 34C15 34C25
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Coefficient conditions for the existence of a Dulac center of a differential system with one zero characteristic root and cubic right- hand sides. (English. Russian original) Zbl 0687.34025

Sov. Math., Dokl. 38, No. 3, 609-613 (1989); translation from Dokl. Akad. Nauk SSSR 303, No. 4, 799-803 (1988).
Reviewer: Y.V.Rogovchenko
MSC:  34C05 34C15 34C25
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On Coleman’s principle for finding the stationary points of quadratic functionals. (English. Russian original) Zbl 0537.49025

Sov. Math., Dokl. 27, 624-627 (1983); translation from Dokl. Akad. Nauk SSSR 270, 529-532 (1983).
Reviewer: S.Balint
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The distribution of norms of primitive hyperbolic classes of the modular group and asymptotic formulas for the eigenvalues of the Laplace-Beltrami operator on a fundamental region of the modular group. (English. Russian original) Zbl 0419.10030

Sov. Math., Dokl. 19, 1053-1056 (1978); translation from Dokl. Akad. Nauk SSSR 242, 40-43 (1978).
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On some global bifurcations connected with the disappearance of a fixed point of saddle-node type. (English. Russian original) Zbl 0312.34035

Sov. Math., Dokl. 15, 1761-1765 (1974); translation from Dokl. Akad. Nauk SSSR 219, 1281-1284 (1974).
MSC:  34D30 34C05 37C75
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The problem of integral curve generation from a separatrix cone of a two- dimensional complex dynamical system. (English. Russian original) Zbl 0274.34026

Sov. Math., Dokl. 13, 1708-1712 (1972); translation from Dokl. Akad. Nauk SSSR 207, 1277-1280 (1972).
MSC:  37-XX 34C20 34C05
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