The basis problem for CCC posets

Author(s):  
Boban Velickovic
Keyword(s):  
2012 ◽  
Vol 29 (3) ◽  
pp. 571-590 ◽  
Author(s):  
Jian Rong Li ◽  
Wen Ting Zhang ◽  
Yan Feng Luo

2015 ◽  
Vol 91 (2) ◽  
pp. 524-537
Author(s):  
Xun Hu ◽  
Yuzhu Chen ◽  
Yanfeng Luo

1980 ◽  
Vol 56 (6) ◽  
pp. 280-284 ◽  
Author(s):  
Hiroaki Hijikata ◽  
Arnold Pizer ◽  
Tom Shemanske
Keyword(s):  

2012 ◽  
Vol 49 (3) ◽  
pp. 366-389 ◽  
Author(s):  
Edmond Lee

The smallest monoid containing a 2-testable semigroup is defined to be a 2-testable monoid. The well-known Brandt monoid B21 of order six is an example of a 2-testable monoid. The finite basis problem for 2-testable monoids was recently addressed and solved. The present article continues with the investigation by describing all monoid varieties generated by 2-testable monoids. It is shown that there are 28 such varieties, all of which are finitely generated and precisely 19 of which are finitely based. As a comparison, the sub-variety lattice of the monoid variety generated by the monoid B21 is examined. This lattice has infinite width, satisfies neither the ascending chain condition nor the descending chain condition, and contains non-finitely generated varieties.


1998 ◽  
Vol 104 (1) ◽  
pp. 51-124 ◽  
Author(s):  
Paolo Terenzi

Sign in / Sign up

Export Citation Format

Share Document