Introduction to Hilbert space 
Young, Nicholas. 
 - Cambridge [England] ; | New York :  Cambridge University Press,  1988 
 - 239 p. ;  24 cm. 
 - Cambridge mathematical textbooks .
<br/><br/> Includes indexes. 
<br/><br/><label>ISBN: </label>0521330718 | 0521337178 (pbk.)