American journal of  mathematics / 

 - Baltimore, Maryland U.S. ;  Johns Hopkins University Press ,   October-December 2019. 
 - Volume 141, various paging :  illustrations ;  26 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics.
<br/><br/><label>Dewey Class. No.: </label>DPer 510.5 Am351 October-December 2019 v. 141 n. 5-6