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Regularized Trace of a Sturm–Liouville Operator on a Curve with a Regular Singularity on the Chord

Regularized Trace of a Sturm–Liouville Operator on a Curve with a Regular Singularity on the Chord For a Sturm–Liouville operator on a piecewise smooth curve, we study the effect that thespectrum of a nonintegrable singularity of the potential on the segment joining the endpoints ofthis curve has on the operator asymptotics. It is shown that in the case where the singular pointdoes not give rise to the branching of solutions in its neighborhood (the case of trivialmonodromy), the spectral asymptotics and the formula for the regularized trace look the same asfor the classical Sturm–Liouville operator on a segment with smooth potential. Further, it isshown that in the case of nontrivial monodromy the spectral asymptotics substantially depends onthe commensurability of the parts into which the segment is partitioned by the singular point\documentclass[12pt]{minimal}\usepackage{amsmath}\usepackage{wasysym}\usepackage{amsfonts}\usepackage{amssymb}\usepackage{amsbsy}\usepackage{mathrsfs}\usepackage{upgreek}\setlength{\oddsidemargin}{-69pt}\begin{document}$$\theta$$\end{document}: if \documentclass[12pt]{minimal}\usepackage{amsmath}\usepackage{wasysym}\usepackage{amsfonts}\usepackage{amssymb}\usepackage{amsbsy}\usepackage{mathrsfs}\usepackage{upgreek}\setlength{\oddsidemargin}{-69pt}\begin{document}$$\theta$$\end{document} is rational, then the spectrum is divided intofinitely many series, each going to infinity along “its own” parabola. In this case, the regularizedtrace formula is significantly more complicated and does not show any similarity with the classicalformula. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Differential Equations Springer Journals

Regularized Trace of a Sturm–Liouville Operator on a Curve with a Regular Singularity on the Chord

Differential Equations , Volume 56 (10) – Oct 13, 2020

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References (14)

Publisher
Springer Journals
Copyright
Copyright © Pleiades Publishing, Ltd. 2020
ISSN
0012-2661
eISSN
1608-3083
DOI
10.1134/S00122661200100018
Publisher site
See Article on Publisher Site

Abstract

For a Sturm–Liouville operator on a piecewise smooth curve, we study the effect that thespectrum of a nonintegrable singularity of the potential on the segment joining the endpoints ofthis curve has on the operator asymptotics. It is shown that in the case where the singular pointdoes not give rise to the branching of solutions in its neighborhood (the case of trivialmonodromy), the spectral asymptotics and the formula for the regularized trace look the same asfor the classical Sturm–Liouville operator on a segment with smooth potential. Further, it isshown that in the case of nontrivial monodromy the spectral asymptotics substantially depends onthe commensurability of the parts into which the segment is partitioned by the singular point\documentclass[12pt]{minimal}\usepackage{amsmath}\usepackage{wasysym}\usepackage{amsfonts}\usepackage{amssymb}\usepackage{amsbsy}\usepackage{mathrsfs}\usepackage{upgreek}\setlength{\oddsidemargin}{-69pt}\begin{document}$$\theta$$\end{document}: if \documentclass[12pt]{minimal}\usepackage{amsmath}\usepackage{wasysym}\usepackage{amsfonts}\usepackage{amssymb}\usepackage{amsbsy}\usepackage{mathrsfs}\usepackage{upgreek}\setlength{\oddsidemargin}{-69pt}\begin{document}$$\theta$$\end{document} is rational, then the spectrum is divided intofinitely many series, each going to infinity along “its own” parabola. In this case, the regularizedtrace formula is significantly more complicated and does not show any similarity with the classicalformula.

Journal

Differential EquationsSpringer Journals

Published: Oct 13, 2020

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