We discuss inverse resonance scattering for the Laplacian on a rotationally symmetric manifold whose rotation radius is constant outside some compact interval. The Laplacian on M is unitarily equivalent to a direct sum of one-dimensional Schrödinger operators with compactly supported potentials on the half-line. We prove
Asymptotics of counting function of resonances at large radius.
The rotation radius is uniquely determined by its eigenvalues and resonances.
There exists an algorithm to recover the rotation radius from its eigenvalues and resonances.
The proof is based on some non-linear real analytic isomorphism between two Hilbert spaces.
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