On one-dimensional potential barriers having equal reflexion and transmission coefficients

Abstract
Based on the results of earlier studies on the perturbations of the Schwarzschild and the Reissner–Nordström black holes, it is shown that there exists a very general class of potential pairs (V(+) and V(-) which yield the same reflexion and transmission coefficients. It is further shown that these potentials, V(+) and V(-), satisfy an infinite hierarchy of integral equalities which are, formally, the same as the conserved quantities allowed by the Korteweg–deVries equation.

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