THE OPERATOR APPROACH TO THE SOLUTION OF THE 
NON-RELATIVISTIC TIME-INDEPENDENT SCHR\"0DINGER EQUATION

V.A. Sidorovich

Skobeltsyn Institute of Nuclear Physics, Moscow State University

The new operator approach to the solution of the non-relativistic 
time-independent Schr\"odinger equation for a few-body quantum system 
with a pair-wise interaction is presented. The problem is solved on 
the basis of the sequential account of configurations (SAC) method 
proposed. The wavefunction of a few-body system determined with 
allowance for the configuration interaction (CI- wavefunction) 
is expressed in terms of the single-configuration wavefunctions with 
use of the configuration mixing operator M introduced.