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Congruences on pseudocomplemented semilattices

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Heleyová Z.

Discussiones Mathematicae - General Algebra and Applications

2000

tom 20

nr 2

219-231

It is known that congruence lattices of pseudocomplemented semilattices are pseudocomplemented [4]. Many interesting properties of congruences on pseudocomplemented semilattices were described by Sankappanavar in [4], [5], [6]. Except for other results he described congruence distributive pseudocomplemented semilattices [6] and he characterized pseudocomplemented semilattices whose congruence lattices are Stone, i.e. belong to the variety B₁ [5]. In this paper we give a partial solution to a more general question: Under what condition on a pseudocomplemented semilattice its congruence lattice is element of the variety Bₙ (n ≥ 2)? In the last section we widen the Sankappanavar's result to obtain the description of pseudocomplemented semilattices with relative Stone congruence lattices. A partial solution of the description of pseudocomplemented semilattices with relative (Lₙ)-congruence lattices (n ≥ 2) is also given.

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1 Discussiones Mathematicae - General Algebra and Applications

1 Heleyová Z.

1 2000

Wyniki wyszukiwania

Congruences on pseudocomplemented semilattices