Collatz, Lothar.  <br/><br/>
Functional analysis and numerical mathematics / 
Lothar Collatz ; translated by Hansjorg Oser. 
 - New York :  c 1966.  Academic Press,  
 - xx, 473 p. :  ills. ;  22 cm. 
<br/><br/> Includes index. 
<br/><br/>312  312 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Approximation function.
<br/><br/><label>Dewey Class. No.: </label>517.5 / C685f