Mathematics – Spectral Theory
Scientific paper
2000-02-04
Geom. Funct. Anal. 8 (1998), no. 1, 179--217
Mathematics
Spectral Theory
Scientific paper
This paper generalizes the methods and results of our article xxx.lanl.gov math.SP/0002036 from elliptic to general non-degenerate closed geodesics. The main purpose is to introduce a quantum Birkhoff normal form of the Laplacian at a general non-degenerate closed geodesic in the sense of V.Guillemin. Guillemin proved that the coefficients of the normal form at an elliptic closed geodesic could be determined from the wave invariants of this geodesic. We give a new proof, and extend its range to any non-degenerate closed geodesic.
Zelditch Steve
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