Algebra universalis

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  Año 2012, Vol. 68, Número 1-2

  • Implicit definition of the quaternary discriminator

    Miguel A. Campercholi, Diego J. Vaggione

    págs. 1-16

    

  • Isotone maps on lattices

    George M. Bergman, G. Grätzer

    págs. 17-37

    

  • Birkhoff�s variety theorem in many sorts

    Jirí Adámek, Jirí Rosický, Enrico Vitale

    págs. 39-42

    

  • Preservation of Sahlqvist fixed point equations in completions of relativized fixed point Boolean algebras with operators

    Nick Bezhanishvili, Ian Hodkinson

    págs. 43-56

    

  • Downward closure of depth in countable Boolean algebras

    Asher M. Kach, Steffen Lempp

    págs. 57-74

    

  • Coset laws for categorical skew lattices

    Joao Pita Costa

    págs. 75-89

    

  • Various disconnectivities of spaces and projectabilities of l-groups

    Ricardo E. Carrera

    págs. 91-109

    

  • An algebraic closure for barycentric algebras and convex sets

    Gábor Czédli, Anna B. Romanowska

    págs. 111-143

    

  • Periodic lattice-ordered pregroups are distributive

    Nikolaos Galatos, Peter Jipsen

    págs. 145-150

    

  • Functionally dense relation algebras

    Hajnal Andréka, Steven Givant

    págs. 151-191