On the resolvent and spectral functions of a second order differential operator with a regular singularity

Details On the resolvent and spectral functions of a second order differential operator with a regular singularity On the resolvent and spectral functions of a second order differential operator with a regular singularity

2004-04-14

arxiv.org/abs/math-ph/0404034v2

J.Math.Phys. 45 (2004) 4560-4577

Physics

Mathematical Physics

LaTeX, 26 pages, 2 figures. Typos corrected

Scientific paper

We consider the resolvent of a second order differential operator with a regular singularity, admitting a family of self-adjoint extensions. We find that the asymptotic expansion for the resolvent in the general case presents unusual powers of $\lambda$ which depend on the singularity. The consequences for the pole structure of the $\zeta$-function, and the small-$t$ asymptotic expansion of the heat-kernel, are also discussed.

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