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Manuel Abad [11]M. Abad [4]Maria Jf Abad [1]Mónica Viñarás Abad [1]
Maria J. F. Abad [1]
  1.  23
    Free‐Decomposability in Varieties of Semi‐Heyting Algebras.Manuel Abad, Juan Manuel Cornejo & Patricio Díaz Varela - 2012 - Mathematical Logic Quarterly 58 (3):168-176.
    In this paper we prove that the free algebras in a subvariety equation image of the variety equation image of semi-Heyting algebras are directly decomposable if and only if equation image satisfies the Stone identity.
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  2.  73
    Varieties of Three-Valued Heyting Algebras with a Quantifier.M. Abad, J. P. Díaz Varela, L. A. Rueda & A. M. Suardíaz - 2000 - Studia Logica 65 (2):181-198.
    This paper is devoted to the study of some subvarieties of the variety Qof Q-Heyting algebras, that is, Heyting algebras with a quantifier. In particular, a deeper investigation is carried out in the variety Q 3 of three-valued Q-Heyting algebras to show that the structure of the lattice of subvarieties of Qis far more complicated that the lattice of subvarieties of Heyting algebras. We determine the simple and subdirectly irreducible algebras in Q 3 and we construct the lattice of subvarieties (...)
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  3. Free-Decomposability in Varieties of Semi-Heyting Algebras.Manuel Abad, Juan Manuel Cornejo & José Patricio Díaz Varela - 2012 - Mathematical Logic Quarterly 58 (3):168-176.
     
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  4.  18
    Varieties of Three-Values Heyting Algebras with a Quantifier.Manuel Abad, J. P. Diaz Varela & L. A. Rueda - 2000 - Studia Logica 65 (2):181-198.
    This paper is devoted to the study of some subvarieties of the variety Q of Q-Heyting algebras, that is, Heyting algebras with a quantifier. In particular, a deeper investigation is carried out in the variety Q subscript 3 of three-valued Q-Heyting algebras to show that the structure of the lattice of subvarieties of Q is far more complicated that the lattice of subvarieties of Heyting algebras. We determine the simple and subdirectly irreducible algebras in Q subscript 3 and we construct (...)
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  5.  15
    Zariski‐Type Topology for Implication Algebras.Manuel Abad, Diego Castaño & José P. Díaz Varela - 2010 - Mathematical Logic Quarterly 56 (3):299-309.
    In this work we provide a new topological representation for implication algebras in such a way that its one-point compactification is the topological space given in [1]. Some applications are given thereof.
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  6.  22
    Editorial Introduction.Manuel Abad & Alejandro Petrovich - 2011 - Studia Logica 98 (1-2):1-3.
  7.  14
    Free Double Ockham Algebras.Manuel Abad & J. Patricio Díaz Varela - 1999 - Journal of Applied Non-Classical Logics 9 (1):173-183.
    ABSTRACT The variety O2 of double Ockham algebras consists of the algebras of type where and are Ockham algebras. In [16], M. Sequeira introduced several subvarieties of O2. In this paper we give a construction of free double Ockham algebras on a partially ordered set. We also describe free objects for the subvarieties of O2 considered in [16].
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  8.  6
    Zariski-Type Topology for Implication Algebras.Manuel Abad, Diego Castaño & José Patricio Díaz Varela - 2010 - Mathematical Logic Quarterly 56 (3):299-309.
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  9.  3
    Perception Without Awareness: The Qualitative Differences Approach.Juan J. Ortetts, Maria T. Daza, Encarna Carmona Carmen Noguera, Elaine Fox & Maria Jf Abad - 2002 - In Serge P. Shohov (ed.), Advances in Psychology Research. Nova Science Publishers. pp. 1.
  10. Acciones bidireccionales en la Red: herramientas de la web 2.0 en la gestión de la comunicación de las instituciones culturales. [REVIEW]Mónica Viñarás Abad - 2010 - Telos: Cuadernos de Comunicación E Innovación 82:142-151.
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  11. On Three-Valued Moisil Algebras.M. Abad & L. Monteiro - 1984 - Logique Et Analyse 27 (8):407-414.
  12. Perception Without Awareness: The Qualitative Differences Approach.Juan J. Ortells, Maria T. Daza, Carmen Noguera, Encarna Carmona, Elaine Fox & Maria J. F. Abad - 2002 - In Serge P. Shohov (ed.), Advances in Psychology Research, Vol. 14. Nova Science Publishers. pp. 119-142.
     
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