Small-divisor equation with large-variable coefficient and periodic solutions of DNLS equations (Q479968)
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scientific article; zbMATH DE number 6377789
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | Small-divisor equation with large-variable coefficient and periodic solutions of DNLS equations |
scientific article; zbMATH DE number 6377789 |
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Small-divisor equation with large-variable coefficient and periodic solutions of DNLS equations (English)
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8 December 2014
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This paper proves the existence of periodic solutions for perturbations of the derivative nonlinear Schrödinger equation. It makes use of a KAM-type theorem for infinite dimensions in order to obtain the results. The theorem is formulated in a setting appropriate for this type of Schrödinger equations. It is an improvement of previous works.
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KAM theory
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derivative nonlinear Schrödinger equation
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multiple normal frequency
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0.9148872
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0.89538884
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0.8893153
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0.88228387
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