Jorgensen, Palle E. T <br/><br/>
Spectral theory for infinitesimal generators of on-parameter groups of isometries  the mini-max principle, the Rayleigh-Ritz Technique, compact perturbation 
Palle E. T. Jorgensen 
 - Aarhus  Universitet Aarhus  1980 
 - 47 p  20 cm 
 - Preprint series  16 .
<br/><br/> Contine bibliografie  Lucrarea este multigrafiata