数学物理学报(英文版) ›› 2011, Vol. 31 ›› Issue (4): 1613-1623.doi: 10.1016/S0252-9602(11)60347-0
方捷|王雷波
FANG Jie, WANG Lei-Bo
摘要:
The variety ddpM of de Morgan algebras with double demi-pseudocomplem-entation consists of those algebras (L;∧,∨,? ,* ,+ , 0, 1) of type (2, 2, 1, 1, 1, 0, 0) where (L; ∧,∨,? , 0, 1) is a de Morgan algebra, (L;∧,∨, *,+ , 0, 1) is a double demi-p-lattice and the operations x → x?, x → x* and x → x+ are linked by the identities x*? = x?*, x+? = x?+ and x*+ = x+*. In this paper, we characterize congruences on a ddpM-algebra, and give a description of the subdirectly irreducible algebras.
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