Normal forms for functions near degenerate critical points, the Weyl groups of A\(_k\), D\(_k\), E\(_k\) and lagrangian singularities. (English. Russian original) Zbl 0278.57011

Funct. Anal. Appl. 6, 254-272 (1973); translation from Funkts. Anal. Prilozh. 6, No. 4, 3-25 (1972).


57R45 Singularities of differentiable mappings in differential topology
57R30 Foliations in differential topology; geometric theory
26E10 \(C^\infty\)-functions, quasi-analytic functions
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