Korneichuk, N. <br/><br/>
Exact constants in approximation theory / 
N. Korneichuk ; translated from the Russian by K. Ivanov 
 - Cambridge, England :  Cambridge University Press,  c1991 
 - xii, 452 p. :  ill. ;  25 cm. 
 - Encyclopedia of mathematics and its applications .
 - Encyclopedia of mathematics and its applications .
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>9780521382342 0521382343 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Approximation theory