Butzer, Paul Leo,  1928- <br/><br/>
Semi-groups of operators and approximation / 
Paul L. Butzer and Hubert Berens 
 - Berlin :  Springer,  1967 
 - xi, 318 p. ;  24 cm. 
 - Die Grundlehren der mathematischen Wissenschaften in Einzeldarstellungen ;  Bd. 145 .
<br/><br/> Includes index 
<br/><br/>Bibliography: p. 295-313 
<br/><br/><label>ISBN: </label> DM 62.00 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Banach spaces<br/>Semigroups of operators<br/>Approximation theory<br/>Group theory
<br/><br/><label>Dewey Class. No.: </label>517.7