Kardiologiia.
KlinMed Consulting.
Vol. 53.
2013.
P. 13-23
Interaction effects between a quantum system and the quantum part of a measurement system leads to the complexification of the initial system's observable operator. Computer algebra methods of Maple help to express operators of the hydrogen-like atom observables in explicit form. We use these operators to solve a spectrum estimation problem using a procedure for computation of the Ritz matrix in Maple. © 2013 Springer International Publishing.