Butzer Paul L <br/><br/>
Semi - groups of operators and approximation 

 -  1967 
 - 318p.  cm. 
<br/><br/><label>Standard No.: </label>280,598 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>MATHEMATICS
<br/><br/><label>Dewey Class. No.: </label>B43, K7