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Subdirectly irreducible sectionally pseudocomplemented semilattices

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Abstract

Sectionally pseudocomplemented semilattices are an extension of relatively pseudocomplemented semilattices—they are meet-semilattices with a greatest element such that every section, i.e., every principal filter, is a pseudocomplemented semilattice. In the paper, we give a simple equational characterization of sectionally pseudocomplemented semilattices and then investigate mainly their congruence kernels which leads to a characterization of subdirectly irreducible sectionally pseudocomplemented semilattices.

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Supported by the Council of the Czech Government, MSM 6198959214.

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Halaš, R., Kühr, J. Subdirectly irreducible sectionally pseudocomplemented semilattices. Czech Math J 57, 725–735 (2007). https://doi.org/10.1007/s10587-007-0109-x

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  • DOI: https://doi.org/10.1007/s10587-007-0109-x

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