Algebra, Logic and Topology

 

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publications

Maria Manuel Clementino, Andrei Akhvlediani, Walter Tholen, On the categorical meaning of Hausdorff and Gromov distances, I, Pré-publicações do Departamento de Matemática da Universidade de Coimbra 09-01 (2009);

Maria Manuel Clementino, Dirk Hofmann, Isar Stubbe, Exponentiable Functors Between Quantaloid-Enriched Categories, Applied Categorical Structures 17 (2009), no. 1, 91-101;

Maria Manuel Clementino, Dirk Hofmann, Relative injectivity as cocompleteness for a class of distributors, Theory and Applications of Categories 21 (2009), 210-230;

Maria Manuel Clementino, Dirk Hofmann, Lawvere Completeness in Topology, Applied Categorical Structures 17 (2009), no. 2, 175-210;

Maria Manuel Clementino, Samson Abramsky, Ross Street, Applied Categorical Structures 17 (3) - Special issue: Topology and Homotopy, First of four issues devoted to the international conference "Category Theory 2007". (2009);

Maria Manuel Clementino, Samson Abramsky, Ross Street, Applied Categorical Structures 17 (4) - Special issue: Semi-abelian categories, A special volume containing part of the proceedings of the international conference "Category Theory 2007". (2009);

Alfredo Costa, Jorge Almeida, Infinite-vertex free profinite semigroupoids and symbolic dynamics, Journal of Pure and Applied Algebra 213 (2009), no. 5, 605-631;

Alfredo Costa, Benjamin Steinberg, Profinite groups associated to sofic shifts are free, Pré-publicações do Departamento de Matemática da Universidade de Coimbra 09-28 (2009);

Gonçalo Gutierres, Dirk Hofmann, Sequential convergence via Galois correspondences, Acta Mathematica Hungarica 123 (2009), no. 1-2, 187-202;

Sandra Marques Pinto, Maria Teresa Oliveira-Martins, Subdirectly irreducible separable dynamic algebras, Pré-publicações do Departamento de Matemática da Universidade de Coimbra 09-21 (2009);

Jorge Picado, Javier Gutiérrez García, Tomasz Kubiak, Pointfree forms of Dowker's and Michael's insertion theorems, Journal of Pure and Applied Algebra 213 (2009), no. 1, 98-108;

Maria João Ferreira, Jorge Picado, Javier Gutiérrez García, Insertion of continuous real functions on spaces, bispaces, ordered spaces and point-free spaces - a common root, Pré-publicações do Departamento de Matemática da Universidade de Coimbra 09-04 (2009);

Jorge Picado, Javier Gutiérrez García, Tomasz Kubiak, Localic real functions: a general setting, Journal of Pure and Applied Algebra 213 (2009), no. 6, 1064-1074;

Jorge Picado, Javier Gutiérrez García, Tomasz Kubiak, Lower and upper regularizations of frame semicontinuous real functions, Algebra Universalis 60 (2009), no. 2, 169-184;

Jorge Picado, Seashells: the plainness and beauty of their mathematical description, Loci, journal of the MAA Math Digital Library (2009), 1-18;

Maria João Ferreira, Jorge Picado, The semicontinuous quasi-uniformity of a frame, revisited, Pré-publicações do Departamento de Matemática da Universidade de Coimbra 09-30 (2009);

Jorge Picado, On the description of frame asymmetric uniformities via paircovers, Pré-publicações do Departamento de Matemática da Universidade de Coimbra 09-34 (2009);

Maria João Ferreira, Jorge Picado, Javier Gutiérrez García, Completely normal frames and real-valued functions, Topology and its Applications 156 (2009), no. 18, 2932–2941;

Jorge Picado, Javier Gutiérrez García, Iraide Mardonez-Perez, M. A. de Prada Vicente, On the uniformization of L-valued frames, Pré-publicações do Departamento de Matemática da Universidade de Coimbra 09-42 (2009);

Diana Rodelo, Directions for the long exact cohomology sequence in Moore categories, Applied Categorical Structures 17 (2009), no. 4, 387-418;

Paulo Saraiva, Alexander P. Pojidaev, On simple Filippov superalgebras of type B(0, n), II, Portugaliae Mathematica 61 (2009), no. 1, 115-130;

Manuela Sobral, George Janelidze, Descent for regular epimorphisms in Barr exact Goursat categories, Pré-publicações do Departamento de Matemática da Universidade de Coimbra 09-03 (2009);

Lurdes Sousa, On boundedness and small-orthogonality classes, Cahiers de Topologie et Géométrie Différentielles Catégoriques L (2009), no. 1, 67-79;

Lurdes Sousa, Jirí Adámek, On quasi-equations in locally presentable categories II: a logic, Pré-publicações do Departamento de Matemática da Universidade de Coimbra 09-11 (2009);

Lurdes Sousa, J. Adámek, M. Hébert, The Orthogonal Subcategory Problem and the Small Object Argument, Applied Categorical Structures 17 (2009), no. 3, 211-246;

Tim Van der Linden, Tomas Everaert, A note on double central extensions in exact Mal'tsev categories, Pré-publicações do Departamento de Matemática da Universidade de Coimbra 09-06 (2009);

Tim Van der Linden, José Manuel Casas, A relative theory of universal central extensions, Pré-publicações do Departamento de Matemática da Universidade de Coimbra 09-10 (2009);

Tim Van der Linden, Tomas Everaert, Galois theory and commutators, Pré-publicações do Departamento de Matemática da Universidade de Coimbra 09-36 (2009);

Maria Manuel Clementino, Lurdes Sousa, Francis Borceux, Marino Gran, Protolocalisations of homological categories, Journal of Pure and Applied Algebra 212 (2008), 1898–1927;

Maria Manuel Clementino, George Janelidze, Robert Rosebrugh (eds), Jiri Rosický, Theory and Applications of Categories, 21 - The Tholen Festschrift, A special volume dedicated to Walter Tholen on the occasion of his 60'th birthday (2008);

Maria Manuel Clementino, George Janelidze, Robert Rosebrugh, Jiri Rosický, Foreword, Theory and Applications of Categories 21 - The Tholen Festschrift, 1-6 (2008);

Maria Manuel Clementino, Jorge Picado, An interview with F. W. Lawvere (Part Two), CIM Bulletin 24 (2008), 21-28;

Gonçalo Gutierres, On countable choice and sequential spaces, Mathematical Logic Quarterly 54 (2008), no. 2, 145-152;

Gonçalo Gutierres, The Ultrafilter Closure in ZF, Pré-publicações do Departamento de Matemática da Universidade de Coimbra 08-37 (2008);

Jorge Picado, J. Gutiérrez García, Tomasz Kubiak, Monotone insertion and monotone extension of frame homomorphisms, Journal of Pure and Applied Algebra 212 (2008), no. 5, 955-968;

Jorge Picado, Maria Angeles de Prada Vicente, Javier Gutiérrez García, Iraide Mardones-Perez, Uniform-type structures on lattice-valued spaces and frames, Fuzzy Sets and Systems 159 (2008), 2469– 2487;

Jorge Picado, Ales Pultr, Locales treated mostly in a covariant way, DMUC, Textos de Matemática, Vol. 41, xi + 104 pages (2008);

Maria do Céu Pinto, Boolean full Kripke structures are alg-universal, Pré-publicações do Departamento de Matemática da Universidade de Coimbra 08-13 (2008);

Sandra Marques Pinto, Maria Teresa Oliveira-Martins, Maria do Céu Pinto, Congruences on dynamic algebras, Logic Journal of the IGPL 16 (2008), no. 1, 15-31;

Diana Rodelo, Tim Van der Linden, The third cohomology group classifies double central extensions, Pré-publicações do Departamento de Matemática da Universidade de Coimbra 08-55 (2008);

Diana Rodelo, Marino Gran, A universal construction in Goursat categories, Cahiers de Topologie et Géométrie Différentielles Catégoriques XLIX (2008), no. 3, 196-208;

Manuela Sobral, George Janelidze, Descent for compact 0-dimensional spaces, Theory and Applications of Categories 21 (2008), no. 10, 182–190;

Manuela Sobral, George Janelidze, Profinite relational structures, Cahiers de Topologie et Géométrie Différentielles Catégoriques XLIX (2008), no. 4, 280-288;

Lurdes Sousa, Francis Borceux, Achim Jung (eds.), Jiri Rosický, Cahiers de Topologie et Géométrie Différentielles Catégoriques - Three Volumes of "CAHIERS" dedicated to Jirí Adámek, A special volume dedicated to J. Adámek on the occasion of his 60'th birthday (2008);

Lurdes Sousa, Francis Borceux, Achim Jung, Jiri Rosický, Foreword, Cahiers de Topologie et Géométrie Différentielles Catégoriques - Vol. XLIX, 163-175 (2008);

Tim Van der Linden, Tomas Everaert, Marino Gran, Higher Hopf formulae for homology via Galois theory, Advances in Mathematics 217 (2008), no. 5, 2231-2267;

Tim Van der Linden, Marino Gran, On the second cohomology group in semi-abelian categories, Journal of Pure and Applied Algebra 212 (2008), no. 3, 636-651;

Maria Manuel Clementino, Dirk Hofmann, On some special classes of continuous maps, Elsevier, Open Problems in Topology II, Part 4, Chapter 39 (2007), 367-376;

Maria Manuel Clementino, Jorge Picado, An interview with F. W. Lawvere (Part One), CIM Bulletin 23 (2007), 23-27;

Maria Manuel Clementino, Towards categorical behaviour of groups, CIM Bulletin 23 (2007), 7-12;

Alfredo Costa, Pseudovarieties defining classes of sofic subshifts closed under taking shift equivalent subshifts, Journal of Pure and Applied Algebra 209 (2007), 517-530;

Margarida Dias, Priestley spaces: the threefold way, Pré-publicações do Departamento de Matemática da Universidade de Coimbra 07-25 (2007);

Gonçalo Gutierres, Dirk Hofmann, Axioms for sequential convergence, Applied Categorical Structures 15 (2007), no. 5-6, 599-614;

Jorge Picado, J. Gutiérrez García, On the algebraic representation of semicontinuity, Journal of Pure and Applied Algebra 210 (2007), no. 2, 299-306;

Maria João Ferreira, Jorge Picado, On point-finiteness in pointfree topology, Applied Categorical Structures 15 (2007), 185-198;

Jorge Picado, An interview with Eduardo L. Ortiz, CIM Bulletin 22 (2007), 20-23;

Jorge Picado, Ales Pultr, Anna Tozzi, Ideals in Heyting semilattices and open homomorphisms, Quaestiones Mathematicae 30 (2007), no. 4, 391-405;

Jorge Picado, A beleza matemática das conchas marinhas, Gazeta de Matemática 152 (2007), 10-15;

Jorge Picado, Helder Pinto, A descrição matemática das conchas e do seu crescimento, Página do Atractor - Matemática Interactiva www.atractor.pt/mat/conchas/ (2007);

Diana Rodelo, D. Bourn, Cohomology without projectives, Cahiers de Topologie et Géométrie Différentielle Catégoriques XLVIII (2007), no. 2, 104-153;

Manuela Sobral, Lurdes Sousa, Jirí Adámek, A logic of implications in algebra and coalgebra, Pré-publicações do Departamento de Matemática da Universidade de Coimbra 07-15 (2007);

Lurdes Sousa, J. Adámek, M. Hébert, A logic of injectivity, J. Homotopy Relat. Struct. 2 (2007), no. 2, 13-47;

Maria Manuel Clementino, Dirk Hofmann, Exponentiation in V-categories, Topology and its Applications 153 (2006), no. 16, 3113-3128;

Maria Manuel Clementino, Francis Borceux, Topological protomodular algebras, Topology and its Applications 153 (2006), no. 16, 3085-3100;

Maria Manuel Clementino, Dikran Dikranjan, Walter Tholen, Torsion theories and radicals in normal categories, Journal of Algebra 305 (2006), no. 1, 98-129;

Maria Manuel Clementino, Jorge Picado, An interview with Marcelo Viana, CIM Bulletin 20 (2006), 25-29;

Alfredo Costa, Laura Chaubard, A new algebraic invariant for weak equivalence of sofic subshifts, Pré-publicações do Departamento de Matemática da Universidade de Coimbra 06-57 (2006);

Alfredo Costa, Conjugacy invariants of subshifts: an approach from profinite semigroup theory, Internat. J. Algebra Comput. 16 (2006), no. 4, 629-655;

Gonçalo Gutierres, What is a first countable space?, Topology and its Applications 153 (2006), 3420-3429;

Maria João Ferreira, Jorge Picado, The semicontinuous quasi-uniformity of a frame, Kyungpook Mathematical Journal 46 (2006), no. 2, 189 -200;

Jorge Picado, A new look at localic interpolation theorems, Topology and its Applications 153 (2006), no. 16, 3203-3218;

Jorge Picado, Helder Pinto, Matemática sem palavras, Página do Atractor - Matemática Interactiva www.atractor.pt/mat/sem_palavras/ (2006);

Jorge Picado, Ales Pultr, Sublocale sets and sublocale lattices, Arch. Math. (Brno) 42 (2006), 409-418;

Jorge Picado, Domingos Lopes, A álgebra das tranças, Boletim da Sociedade Portuguesa de Matemática 54 (2006), 29-69;

Sandra Marques Pinto, Maria Teresa Oliveira-Martins, Maria do Céu Pinto, Monadic dynamic algebras, Math. Log. Quart. 52 (2006), no. 2, 134-150;

Paulo Saraiva, Alexander Pojidaev, On derivations of the ternary Malcev algebra M8, Communications in Algebra 34 (2006), 3598-3608;

Manuela Sobral, Lurdes Sousa, Jirí Adámek, Morita equivalence of many-sorted algebraic theories, Journal of Algebra 297 (2006), no. 2, 361-371;

Margarida Dias, Manuela Sobral, Descent for Priestley spaces, Applied Categorical Structures 14 (2006), no. 3, 229-241;

Lurdes Sousa, Jirí Adámek, Michel Hébert, A logic of orthogonality, Arch. Math. (Brno) 42 (2006), 309-334;

Isar Stubbe, More on Q-modules, Pré-publicações do Departamento de Matemática da Universidade de Coimbra 06-13 (2006);

Isar Stubbe, Categorical structures enriched in a quantaloid: tensored and cotensored categories, Theory and Applications of Categories 16 (2006), no. 14, 283–306;

Ana Mascarenhas Melo, S. Busonero, R. Leal, Combinatorial aspects of nodal curves, Le Matematiche, Catania (Italia) LXI (2006), no. I, 109-141;

Maria Manuel Clementino, Francis Borceux, Topological semi-abelian algebras, Advances in Mathematics 190 (2005), no. 1, 425-453;

Maria Manuel Clementino, Dirk Hofmann, George Janelidze, Local homeomorphisms via ultrafilter convergence, Proc. Amer. Math. Soc. 133 (2005), no. 3, 917-922;

Ana Paula Escada, Jorge Almeida, The globals of pseudovarieties of ordered semigroups containing B2 and an application to a problem proposed by Pin, RAIRO Theoretical Informatics and Applications 39 (2005), 1-29;

Maria João Ferreira, Jorge Picado, Functorial quasi-uniformities on frames, Applied Categorical Structures 13 (2005), 281-303;

Maria João Ferreira, Jorge Picado, The Galois approach to uniform structures, Quaestiones Mathematicae 28 (2005), 355-373;

Jorge Picado, An interview with Alexei Sossinsky, CIM Bulletin 19 (2005), 24-29;

Jorge Picado, Helder Pinto, Curvatura e torção, Página do Atractor - Matemática www.atractor.pt/mat/curvtor/ (2005);

Jorge Picado, Helder Pinto, Algarismos de controlo, Página do Atractor - Matemática Interactiva www.atractor.pt/mat/alg_controlo/ (2005);

Manuela Sobral, Lurdes Sousa, Jirí Adámek, Logic of implications, Pré-publicações do Departamento de Matemática da Universidade de Coimbra 05-24 (2005);

Maria Manuel Clementino, Dirk Hofmann, Walter Tholen, One setting for all: metric, topology, uniformity, approach structure, Applied Categorical Structures 12 (2004), no. 2, 127-154;

Maria Manuel Clementino, Ofelia T. Alas, Jerry Vaughan (eds.), Topology and its Applications 137, (2004);

Maria Manuel Clementino, Eraldo Giuli, Walter Tholen, Categorical Foundations. Special Topics in Order, Topology, Algebra, and Sheaf Theory.
Chapter 3: A Functional Approach to General Topology
, Maria Cristina Pedicchio and Walter Tholen (ed.), Encyclopedia of Mathematics and its Applications 97, Cambridge University Press (2004), 103-163;

Maria Manuel Clementino, Dirk Hofmann, Effective descent morphisms in categories of lax algebras, Applied Categorical Structures 12 (2004), no. 5-6, 413-425;

Maria Manuel Clementino, Dirk Hofmann, On extensions of lax monads, Theory and Application of Categories 13 (2004), no. 3, 41-60;

Ana Paula Escada, Jorge Almeida, The globals of some pseudovarieties of DA, International Journal of Algebra and Computation 14 (2004), no. 5-6, 525-549;

Gonçalo Gutierres, On first and second countable spaces and the axiom of choice, Topology and its Applications 143 (2004), no. 1-3, 93-103;

Jorge Picado, Ales Pultr, Anna Tozzi, Categorical Foundations. Special Topics in Order, Topology, Algebra, and Sheaf Theory.
Chapter 2: Locales
, Maria Cristina Pedicchio and Walter Tholen (ed.), Encyclopedia of Mathematics and its Applications 97, Cambridge University Press (2004), 49-101;

Maria João Ferreira, Jorge Picado, A method of constructing compatible quasi-uniformities for an arbitrary frame, Kyungpook Mathematical Journal 44 (2004), no. 3, 415-442;

Jorge Picado, The quantale of Galois connections, Algebra Universalis 52 (2004), no. 4, 527-540;

Diana Rodelo, Moore Categories, Theory and Applications of Categories 12 (2004), no. 6, 237-247;

Manuela Sobral, John MacDonald, Categorical Foundations. Special Topics in Order, Topology, Algebra, and Sheaf Theory.
Chapter 5: Aspects of Monads
, Maria Cristina Pedicchio and Walter Tholen (ed.), Encyclopedia of Mathematics and its Applications 97, Cambridge University Press (2004), 213-268;

Manuela Sobral, George Janelidze, Walter Tholen, Categorical Foundations. Special Topics in Order, Topology, Algebra, and Sheaf Theory.
Chapter 8: Beyond Barr Exactness: Effective Descent Morphisms
, Maria Cristina Pedicchio and Walter Tholen (ed.), Encyclopedia of Mathematics and its Applications 97, Cambridge University Press (2004), 359-405;

Manuela Sobral, Xiuzhan Guo, Walter Tholen, Descent equivalence, Cah. Topol. Géom. Différ. Catég. 45 (2004), no. 4, 301-315;

Manuela Sobral, Descent for discrete (co)fibrations, Applied Categorical Structures 12 (2004), 301-315;

Lurdes Sousa, Jirí Adámek, On reflective subcategories of varieties, Journal of Algebra 276 (2004), 685-705;

Lurdes Sousa, On projective generators relative to coreflective classes, Galois Theory, Hopf Algebras, and Semiabelian Categories, Workshop on Categorical Structures for Descent and Galois Theory, Hopf Algebras, and Semiabelian Categories, Fields Inst. Commun. 43 (2004), no. 523-532;

Maria Manuel Clementino, Walter Tholen, Metric, Topology and Multicategory - A Common Approach, J. Pure Appl. Algebra 179 (2003), no. 1, 13-47;

Maria Manuel Clementino, Dirk Hofmann, Walter Tholen, The convergence approach to exponentiable maps, Portugaliae Mathematica 60 (2003), 139-160;

Maria Manuel Clementino, Dirk Hofmann, Topological features of lax algebras, Applied Categorical Structures 11 (2003), no. 3, 267-289;

Maria Manuel Clementino, Dirk Hofmann, Walter Tholen, Exponentiability in categories of lax algebras, Theory and Applications of Categories 11 (2003), 337-352;

Ana Paula Escada, Jorge Almeida, Semidirect products with pseudovariety of all finite groups, Proceedings of the International Colloquium on Words, Languages and Combinatorics (2003), no. 1-21;

Gonçalo Gutierres, Sequential topological conditions in R in the absence of the axiom of choice, Mathematical Logic Quarterly 49 (2003), no. 3, 293-298;

Lurdes Sousa, Jirí Adámek, How accessible are categories of algebras?, J. Pure Appl. Algebra 182 (2003), no. 1, 1-15;

Maria Manuel Clementino, On finite triquotient maps, J. Pure Appl. Algebra 168 (2002), no. 2-3, 387-389;

Maria Manuel Clementino, Dirk Hofmann, On limit stability of special classes of continuous maps, Topology and its Applications 125 (2002), no. 3, 471-488;

Maria Manuel Clementino, Dirk Hofmann, Triquotient maps via ultrafilter convergence, Proceedings of the American Math. Soc. 130 (2002), 3423-3431;

Ana Paula Escada, The power exponent of a pseudo variety, Semigroup Forum 64 (2002), no. 1, 101-129;

Ana Paula Escada, J. Almeida, On the equation V*G=EV, J. Pure Appl. Algebra 166 (2002), no. 1-2, 1-28;

Jorge Picado, Worthen Hunsaker, Frames with transitive structures, Appl. Categ. Structures 10 (2002), no. 1, 63-79;

Jorge Picado, The gauge of a uniform frame, Appl. Categ. Structures 10 (2002), no. 6, 593-602;

Manuela Sobral, George Janelidze, Finite preorders and topological descent I, J. Pure Appl. Algebra 175 (2002), 187-205;

Manuela Sobral, George Janelidze, Finite preorders and topological descent II: étale descent, J. of Pure and Appl. Algebra 174 (2002), 303-309;

Manuela Sobral, J. Adámek, P.T. Johnstone (eds.), Journal of Pure and Applied Algebra, 168, nº 2-3 (2002);

Lurdes Sousa, Pushout stability of embeddings, injectivity and categories of algebras, Proceedings of the Ninth Prague Topological Symposium (2002), no. 295-308;

Lurdes Sousa, On projective E-generators and premonadic functors, Pré-publicações do Departamento de Matemática da Universidade de Coimbra 02-25 (2002);

Maria Manuel Clementino, Eraldo Giuli, Walter Tholen, What is a quotient map with respect to a closure operator?, Appl. Categ. Structures 9 (2001), no. 2, 139-151;

Maria Manuel Clementino, On connectedness via closure operators, Appl. Categ. Structures 9 (2001), no. 6, 539-556;

Maria Manuel Clementino, Walter Tholen, A note on local compactness, Rend. Istit. Mat. Univ. Trieste 32 (2001), no. suppl. 2, 17-31;

Jorge Picado, The algebra of identification numbers: from modular arithmetic to dihedral groups (in Portuguese), Boletim da Sociedade Portuguesa de Matemática 44, p. 39-73 (2001);

Manuela Sobral, Another approach to topological descent, Appl. Categ. Structures 9 (2001), no. 5, 505-516;

Manuela Sobral, Jirí Adámek, Robert el Bashir, Jirí Velebil, On functors which are lax epimorphisms, Theory Appl. Categ. 8 (2001), no. 20, 509-521;

Lurdes Sousa, On the pullback stability of a quotient map with respect to a closure operator, Theory Appl. Categ. 8 (2001), no. 6, 100-113;

Lurdes Sousa, Jirí Adámek, Constructions of solid hulls, Appl. Categ. Structures 9 (2001), no. 1, 1-13;

Lurdes Sousa, O teorema das quatro cores, Millenium, 24, 125-153 (2001);

Ana Paula Escada, The PG-exponent of a pseudovariety of semigroups, J. Algebra 223 (2000), no. 1, 15-36;

Jorge Picado, Structured frames by Weil entourages, Appl. Categ. Structures 8 (2000), no. 1-2, 351-366;

Jorge Picado, Worthen Hunsaker, A note on total boundedness, Acta Math. Hungar. 88 (2000), no. 1-2, 25-34;

Jorge Picado, A matemática dos bilhetes de identidade, Millenium 19, 279-299 (2000);

Jorge Picado, On complete congruence lattices of join-infinite distributive lattices, Algebra Universalis 44 (2000), no. 3-4, 325-332;

Lurdes Sousa, Jirí Adámek, Walter Tholen, Totality of product completions, Comment. Math. Univ. Carolin. 41 (2000), no. 1, 9-24;

Maria Manuel Clementino, Jorge Picado, Manuela Sobral, Lurdes Sousa, School on category theory and applications, Department of Mathematics, University of Coimbra, Textos de Matemática, Série B, 21 (1999);

Gonçalo Gutierres, On coregular closure operators, Pré-Publicações do Departamento de Matemática da Universidade de Coimbra 99-21 (1999);

Maria Teresa Oliveira-Martins, Tópicos fundamentais da Matemática, DMUC, Textos de Matemática, 3 (1999);

Jorge Picado, Two theorems of Efremovic in pointfree context, J. Pure Appl. Algebra 141 (1999), no. 3, 289-298;

Jorge Picado, Frame quasi-uniformities by entourages, Proceedings Symposium on Categorical Topology (University of Cape Town 1994), Department of Mathematics, University of Cape Town (1999), no. 161-175;

Jorge Picado, Priestley duality within frames, Proceedings of the Workshop on Dualities, Interpretability and Ordered Structures (CAUL, September 1997), University of Lisbon (1999), no. 21-33;

Maria do Céu Pinto, Separable Kripke structures are algebraically universal, Algebra Universalis 42 (1999), 17-48;

Maria Manuel Clementino, Walter Tholen, Separated and connected maps, Appl. Categ. Structures 6 (1998), no. 3, 373-401;

Jorge Picado, Weil nearness spaces, Portugaliae Mathematica 55 (1998), no. 2, 233-254;

Lurdes Sousa, Note on multisolid categories, Journal of Pure and Applied Algebra 129 (1998), 201-205;

Maria Manuel Clementino, Walter Tholen, Separation versus connectedness, Topology and its Applications 75 (1997), 143-181;

Maria Manuel Clementino, Walter Tholen, A characterization of the Vietoris Topology, Topology Proceedings 22 (1997), 71-95;

Maria Manuel Clementino, Eraldo Giuli, Walter Tholen, Topology in a category: compactness, Portugaliae Mathematica 53 (1996), 397-433;

Maria Manuel Clementino, Walter Tholen, Tychonoff's theorem in a category, Proc. Amer. Math. Soc. 124 (1996), 3311-3314;

Maria Manuel Clementino, On categorical notions of compact object, Applied Categorical Structures 4 (1996), 15-29;

Manuela Sobral, Some aspects of topological descent, Applied Categorical Structures 4 (1996), no. 1, 97-106;

Lurdes Sousa, a-sober spaces via the orthogonal closure operator, Applied Categorical Structures 4 (1996), no. 1, 87-95;

Maria Manuel Clementino, Constant morphisms and constant subcategories, Applied Categorical Structures 3 (1995), 119-137;

Jorge Picado, On extended frames, Comment. Math. Univ. Carolinae 36 (1995), no. 3, 537-549;

Jorge Picado, Weil uniformities for frames, Comment. Math. Univ. Carolinae 36 (1995), no. 2, 357-370;

Lurdes Sousa, Solid hulls of concrete categories, Applied Categorical Structures 3 (1995), no. 2, 105-118;

Lurdes Sousa, Orthogonality and closure operators, Cahiers de Topologie et Geometrie Differentielle Categoriques XXXVI - 4 (1995), 323-343;

Jorge Picado, Join-continuous frames, Priestley's duality and biframes, Applied Categorical Structures 2 (1994), no. 3, 297-313;

 
     
 

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