Algebra universalis

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  Año 2020, Vol. 81, Número 2. Texto Completo Ejemplar

  • Notes on planar semimodular lattices. VIII. Congruence lattices of SPS lattices

    G. Grätzer

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    págs. 1-3

    

  • On the variety generated by completions of representable relation algebras

    Ian Hodkinson

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    págs. 1-5

    

  • Joins and Maltsev products of congruence permutable varieties

    Clifford Bergman

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    págs. 1-6

    

  • Tropical Collection

    • The poset of unlabeled induced subgraphs of a finite graph

      Scott R. Sykes

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      págs. 1-8

      

    • Finitary shadows of compact subgroups of S(ω)

      Barbara Majcher-Iwanow

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      págs. 1-11

      

  • Tropical Collection

    • Connected monads weakly preserve products

      H. P. Gumm

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      págs. 1-14

      

    • Varieties of semiassociative relation algebras and tense algebras

      James M. Koussas, Tomasz Kowalski

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      págs. 1-14

      

    • Free and cofree S-quantales

      Xin Zhang, Bin Zhao

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      págs. 1-14

      

    • Lattices and quantales of ideals of semigroups and their preservation under Morita contexts

      Valdis Laan, László Márki, Ülo Reimaa

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      págs. 1-14

      

    • On difunctionality of class relations

      Michael Hoefnagel, Zurab Janelidze, Diana Rodelo

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      págs. 1-15

      

    • Locales whose coz-complemented cozero sublocales have open closures

      Oghenetega Ighedo, Martin M. Mugochi

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      págs. 1-17

      

    • Two-element structures modulo primitive positive constructability

      Manuel Bodirsky, Albert Vucaj

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      págs. 1-17

      

    • Solution sets of systems of equations over finite lattices and semilattices

      Endre Tóth, Tamás Waldhauser

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      págs. 1-21

      

    • The local loop lemma

      Miroslav Olšák

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      págs. 1-23

      

    • Structure theorems for idempotent residuated lattices

      José Gil Férez, Peter Jipsen, George Metcalfe

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      págs. 1-25

      

    • On the structure of C-algebras through atomicity and if-then-else

      Gayatri Panicker, K.V. Krishna, Purandar Bhaduri

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      págs. 1-27

      

    • On epimorphisms of ordered algebras

      Nasir Sohail, Boza Tasic

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      págs. 1-29

      

    • The structure group of a non-degenerate effect algebra

      Carsten Dietzel, Wolfgang Rump

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      págs. 1-30

      

    • Identical inclusions of semilattices

      G. Mashevitzky

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      págs. 1-39

      

    • Internal neighbourhood structures

      Partha Pratim Ghosh

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      págs. 1-51