Deutsch, Frank <br/><br/>
Best approximation in inner product spaces   

 - New York  Springer-Verlag  2001 
 - xv, 338p. Bibl. Index. 
 - CMC books in Mathematics   7 .
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<br/><br/><label>ISBN: </label>0387951563 
<br/><br/><label>Dewey Class. No.: </label>515.73  / D486.BA