Helson, Henry,  <br/><br/>
Invariant subspaces and allied topics 
Henry Helson  
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 - Narosa Publishing House, New Delhi  1990 
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 - .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Algebraic number theory-- Invariant theory-- P-adic numbers-- Quadratic forms-- Algebraic function
<br/><br/><label>Dewey Class. No.: </label>512.74  HEL-I