Institute of Mathematics and Informatics Bulgarian Academy of Sciences
Serdica Mathematical Journal, Vol. 30, No 4, (2004), 471p-482p
We give an easy procedure for solving of the direct and the inverse spectral problems
for the equation. Guseynov used a procedure of the Gelfand-Levitan type
for the case N = 1. We use another procedure and this procedure is more
easy and transparent.