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Operators on the Lattice of Pseudovarieties of Finite Semigroups

โœ Scribed by Norman R. Reilly; Shuhua Zhang

Publisher
Springer
Year
1998
Tongue
English
Weight
212 KB
Volume
57
Category
Article
ISSN
0037-1912

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๐Ÿ“œ SIMILAR VOLUMES

On semidirectly closed pseudovarieties o
On semidirectly closed pseudovarieties of aperiodic semigroups
โœ M.Lurdes Teixeira ๐Ÿ“‚ Article ๐Ÿ“… 2001 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 193 KB

The aim of this work is to study the unknown intervals of the lattice of aperiodic pseudovarieties which are semidirectly closed and answer questions proposed by Almeida in his book "Finite Semigroups and Universal Algebra". The main results state that the intervals [V \* (B2); ER โˆฉ LR] and [V \* (B

Pseudovarieties of finite algebras isomo
Pseudovarieties of finite algebras isomorphic to bounded distributive lattices
โœ Robert W. Quackenbush ๐Ÿ“‚ Article ๐Ÿ“… 1979 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 465 KB

Let X be a class of finite algebras closed under subalgebras, homomorphic images and finite direct products. It is shewn that X is isomorphic to the class of bounded distributive lattices if and only if X is generated by a lattice-primal algebra.