Here we study the singular anharmonic potentials by applying the analytic continuation method of Holubec and Stauffer (1985). In order to do that we have developed several approximations to the problem, because this method cannot be applied when the solution has essential singularities at any point of its domain. All the options here shown have the same precision, giving us the eigenvalues correct to all the decimal places provided by the computer.
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Buendı́a et al. (1995) studied this question.
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