Abstract.
We present a mathematically rigorous proof of the Bender-Wu (Banks-Bender) formula based on exact WKB analysis.
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Submitted 17/02/98, revised 29/08/98, accepted 23/11/98
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Koike, T. On the Perturbation Series in Large O rder of Anharmonic Oscillators. Ann. Henri Poincaré 1, 193–200 (2000). https://doi.org/10.1007/PL00001001
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DOI: https://doi.org/10.1007/PL00001001