A third order operator with periodic coefficients on the real line
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A. V. Badanin and E. L. Korotyaev
Translated by: N. B. Lebedinskaya - St. Petersburg Math. J. 25 (2014), 713-734
- DOI: https://doi.org/10.1090/S1061-0022-2014-01313-1
- Published electronically: July 18, 2014
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Abstract:
The operator $i\partial ^3+i \partial p+i p\partial +q$ with 1-periodic coefficients $p,q\in L_{\mathrm {loc}}^1(\mathbb {R})$ is considered on the real line. The following results are obtained: 1) the spectrum of this operator is absolutely continuous, covers the entire real line, and has multiplicity one or three; 2) the spectrum of multiplicity three is bounded and expressed in terms of real zeros of a certain entire function; 3) the Lyapunov function, analytic on a 3-sheeted Riemann surface, is constructed and investigated.References
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Bibliographic Information
- A. V. Badanin
- Affiliation: Department of Physics, St. Petersburg State University, Ul′yanovskaya 2, Staryi Peterhof, St. Petersburg 198904, Russia
- Email: an.badanin@gmail.com
- E. L. Korotyaev
- Affiliation: Department of Physics, St. Petersburg State University, Ul′yanovskaya 2, Staryi Peterhof, St. Petersburg 198904, Russia
- MR Author ID: 211673
- Email: korotyaev@gmail.com
- Received by editor(s): October 15, 2012
- Published electronically: July 18, 2014
- Additional Notes: Supported by the RF Ministry of Education and Science (the federal program “Scientific and pedagogical potential of innovative Russia”, 2009–2013), contract no. 14.740.11.0581. The second author was also supported by RFBR, grant “Spectral and asymptotic methods of studying differential operators” (no. 11-01-00458).
- © Copyright 2014 American Mathematical Society
- Journal: St. Petersburg Math. J. 25 (2014), 713-734
- MSC (2010): Primary 34L40
- DOI: https://doi.org/10.1090/S1061-0022-2014-01313-1
- MathSciNet review: 3184605