Extended ockham algebras
作者:
T. S. Blyth,
Jie Fang,
期刊:
Communications in Algebra
(Taylor Available online 2000)
卷期:
Volume 28,
issue 3
页码: 1271-1284
ISSN:0092-7872
年代: 2000
DOI:10.1080/00927870008826893
出版商: Gordon and Breach Science Publishers Ltd.
关键词: 06D15;06D30
数据来源: Taylor
摘要:
Here we initiate an investigation into the classeOof extended Ockham algebras, namely bounded distributive lattices endowed with a commuting pair of unary operations, one of which is an endomorphism and the other is a dual endomorphism. A consideration of the subdirectly irreducible algebras leads, via Priestley duality, to a description of all finite subdirectly irreducibleeO-algebras. In particular, we show that there are precisely nine non-isomorphic subdirectly irreducible symmetric extended de Morgan algebras, all of which are simple. We also describe the corresponding lattice of varieties.
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