Sommaire

On ideals of a skew lattice

João Pita Costa

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p. 5-21

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On the solidity of general varieties of tree languages

Magnus Steinby

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p. 23-53

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Some results in bipolar-valued fuzzy ordered AG-groupoids

Faisal ; Naveed Yaqoob ; Arsham Borumand Saeid

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p. 55-76

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Derivations in some finite endomorphism semirings

Ivan Dimitrov Trendafilov

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p. 77-100

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On sets related to maximal clones

Yeni Susanti ; Klaus Denecke

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p. 101-114

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Four-part semigroups - semigroups of Boolean operations

Prakit Jampachon ; Yeni Susanti ; Klaus Denecke

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p. 115-136

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