349 citations · 2.2k across the 57 of their papers we have counts for
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nlin.SI2013★ 61 cited
Extended Krein-Adler theorem for the translationally shape invariant potentials
David Gómez-Ullate, Yves Grandati, Robert Milson
Considering successive extensions of primary translationally shape invariant potentials, we enlarge the Krein-Adler theorem to mixed chains of state adding and state-deleting Darbo…
math-ph2013★ 178 cited
Rational extensions of the quantum harmonic oscillator and exceptional Hermite polynomials
David Gomez-Ullate, Yves Grandati, Robert Milson
We prove that every rational extension of the quantum harmonic oscillator that is exactly solvable by polynomials is monodromy free, and therefore can be obtained by applying a fin…