Received:May 23, 1991  
Key Words:   
Fund Project:
Author NameAffiliation
汪立民 兰州大学数学系 
Hits: 1863
Download times: 1004
Abstract:
      
Citation:
DOI:10.3770/j.issn:1000-341X.1994.01.011
View Full Text  View/Add Comment