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短脈沖方程的長時間漸近分析

活動信息

  • 開始時間:2021-10-22 09:00
  • 活動地點:創新園大廈A1101
  • 主講人:徐建

活動簡介

<p>摘要:We mainly introduce the spectral analysis which is very different from the classical AKNS type Lax pair, such as NLS\MKdV equation, since the short pulse equation admits a WKI type negative order Lax pair. We show the solution of the initial value problem for the short pulse can be reconstructd in terms of the solution of a 2*2 matrix Riemann-Hilbert problem. Then, using the nonlinear steepest descent or Deift-Zhou method, we can obtain the leading order asymptotic behavior as time goes to infinity under no solitons assumption. And this result is more accurate than the result obtained by PDE method, because of the complete integrable property of the short pulse equation. We also show that the no solitons assumption is possible under some special initial value.</p>

主講人介紹

簡介:徐建,上海理工大學理學院副教授,博士畢業于復旦大學數學科學學院。主要從事可積系統和Riemann-Hilbert問題方面的研究。先后主持有國家和上海市自然科學基金青年項目和面上項目等多項研究課題