Ramesh Kumar <br/><br/>
Essential numerical ranges and essential spectra of hilbert space operators 
Ramesh Kumar; Prof B S Yadav Gu.; Dr S C Arora Gu. 
 -  1980 
<br/><br/><label>Standard No.: </label>7009 
<br/><br/><label>Source: </label> Theses 
<br/><br/><label>Subjects--Topical Terms: </label><br/>MATHEMATICS