Idempotent Rank of |Semigroup PC(n,r)
ZHAO Ping, YOU Taijie, XU Bo
Journal of Jilin University Science Edition . 2012, (01): 44 -48 . 

Copyright © Journal of Jilin University Science Edition, All Rights Reserved.
Tel: +86-431-88499428　E-mail: sejuj@jlu.edu.cn
Powered by Beijing Magtech Co. Ltd