## Abstract

The usual theory of semi-classical approximation for the laplacian on riemannian manifolds says that the energy levels of certain lagrangean submanifolds in the cotangent bundle provide approximate eigenvalues of the laplacian asymptotically. In this paper we consider a class of surfaces whose geodesic flows are completely integrable (Liouville surfaces defined over 2-sphere), and show the two results: One is the absence of the corresponding lagrangean submanifolds for certain eigenvalues; and the other is the existence of new approximate values, which are asymptotically finer along a certain direction even where the usual semi-classical approximate values exist.

Original language | English |
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Pages (from-to) | S125-S134 |

Journal | Differential Geometry and its Application |

Volume | 29 |

Issue number | SUPPL. 1 |

DOIs | |

Publication status | Published - Aug 2011 |

## Keywords

- Laplacian
- Liouville surface
- Semi-classical approximation
- Singular lagrangean

## ASJC Scopus subject areas

- Analysis
- Geometry and Topology
- Computational Theory and Mathematics