35 citations · 84 across the 6 of their papers we have counts for
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math-ph2003
Discrete q-derivatives and symmetries of q-difference equations
D. Levi, J. Negro, M. A. del Olmo
In this paper we extend the umbral calculus, developed to deal with difference equations on uniform lattices, to q-difference equations. We show that many of the properties conside…
quant-ph2003
Second Order Darboux Displacements
B F Samsonov, M L Glasser, J Negro +1
The potentials for a one dimensional Schroedinger equation that are displaced along the x axis under second order Darboux transformations, called 2-SUSY invariant, are characterize…