## Abstract

We survey recent results connected with constructing a new family of solutions of the Korteweg-de Vries equation, which we call primitive solutions. These solutions are constructed as limits of rapidly vanishing solutions of the Korteweg-de Vries equation as the number of solitons tends to infinity. A primitive solution is determined nonuniquely by a pair of positive functions on an interval on the imaginary axis and a function on the real axis determining the reflection coefficient. We show that elliptic one-gap solutions and, more generally, periodic finite-gap solutions are special cases of reflectionless primitive solutions.

Original language | English |
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Pages (from-to) | 334-343 |

Number of pages | 10 |

Journal | Theoretical and Mathematical Physics |

Volume | 202 |

Issue number | 3 |

DOIs | |

State | Published - Mar 1 2020 |

## Keywords

- Korteweg-de Vries equation
- integrable system
- primitive solution