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Remarks on pseudo MV-algebras

Ivan Chajda ; Miroslav Kolařík

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p. 5-19

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Horizontal sums of basic algebras

Ivan Chajda

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p. 21-33

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On the matrix negative Pell equation

Aleksander Grytczuk ; Izabela Kurzydło

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p. 35-45

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Hyperidentities in many-sorted algebras

Klaus Denecke ; Somsak Lekkoksung

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p. 47-74

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Special m-hyperidentities in biregular leftmost graph varieties of type (2,0)

Apinant Anantpinitwatna ; Tiang Poomsa-ard

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p. 81-107

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Function classes and relational constraints stable under compositions with clones

Miguel Couceiro ; Stephan Foldes

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p. 109-121

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Hypersatisfaction of formulas in agebraic systems

Klaus Denecke ; Dara Phusanga

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p. 123-151

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The maximal subsemigroups of the ideals of some semigroups of partial injections

Ilinka Dimitrova ; Jörg Koppitz

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p. 153-167

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Two constructions of De Morgan algebras and De Morgan quasirings

Ivan Chajda ; Günther Eigenthaler

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p. 169-180

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Semi-open sets in biclosure spaces

Jeeranunt Khampakdee ; Chawalit Boonpok

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p. 181-201

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Knowledge bases and automorphic equivalence of multi-models versus linear spaces and graphs

Marina Knyazhansky ; Tatjana Plotkin

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p. 203-213

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