Sommerhauser, Yorck,  1966- <br/><br/>
Hopf algebras and congruence subgroups / 
Yorck Sommerhauser, Yongchang Zhu. 
 - 1 online resource (146 pages) :  illustrations. 
 - Memoirs of the American Mathematical Society,  Volume 219, Number 1028  0065-9266 ; .
 - Memoirs of the American Mathematical Society ;  Volume 219, Number 1028. .
<br/><br/> "September 2012 , Volume 219, Number 1028 (first of 5 numbers)." 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>9780821891087 (e-book) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Hopf algebras.<br/>Modular groups.
<br/><br/><label>Index Terms--Genre/Form: </label><br/>Electronic books.
<br/><br/><label>LC Class. No.: </label>QA613.8  / .S666 2012 
<br/><br/><label>Dewey Class. No.: </label>512/.55