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Artigos em Revistas Internacionais
Davey, B.;
Gouveia, M. J.
; Haviar, M.; Priestley, H. A. (2011)
Natural extensions and profinite completions of algebras
Algebra Universalis: 66(3), 205-241.
Araújo, João
; Malheiro, António (2011)
On finite complete presentations and exact decompositions of semigroups
Communications in Algebra: 39, 10, 3866--3878.
Kwuida, Léonard;
Lehtonen, Erkko
(2011)
On the homomorphism order of labeled posets
Order: 28, 251-265.
André, Jorge M.;
Araújo, João
; Konieczny, J. (2011)
Regular centralizers of idempotent transformations
Semigroup Forum: 82(2), 307-318.
Couceiro, Miguel;
Lehtonen, Erkko
(2011)
Self-commuting lattice polynomial functions on chains
Aequationes mathematicae: 81(3), 263-278.
Bleak, Collin; Kassabov, Martin;
Matucci, Francesco
(2011)
Structure theorems for groups of homeomorphisms of the circle
International Journal of Algebra and Computation: 21(6), 1007--1036.
Fernandes, Vítor Hugo;
Gomes, Gracinda M. S.
; Jesus, Manuel M. (2011)
The cardinal and the idempotent number of various monoids of transformations on a finite chain
Bulletin of the Malaysian Mathematical Sciences Society: 34(1), 79–85.
Jedlicka, P.;
Kinyon, M.
; Vojtechovsky, P. (2011)
The structure of commutative automorphic loops
Transactions of the American Mathematical Society: 363(1), 365-384.
McAlister, D. B.;
Soares, Filipa
(2011)
Tiling semigroups of n-dimensional hypercubic tilings
Communications in Algebra: 39(6), 2002-2023.
Gouveia, M. J.
; Haviar, M. (2011)
Transferral of entailment in duality theory II: strong dualisability
Czechoslovak Mathematical Journal: 61(2), 401-417.
Gouveia, M. J.
; Haviar, M. (2011)
Transferral of entailment in duality theory: dualisability
Czechoslovak Mathematical Journal: 61(1), 41-63.
Iglésias, Laura;
Santa-Clara, Catarina
; Silva, Fernando C. (2011)
Unified Min-Max and Interlacing Theorems for Linear Operators
Linear and Multilinear Algebra: 59(6), 651-669.
Araújo, João
; Edmundo, M.; Givant, S. (2011)
v*-algebras, Independence Algebras and Logic
International Journal on Algebra and Computation: 21, 7, 1237-1257.
Lehtonen, Erkko
(2010)
A note on minors determined by clones of semilattices
Novi Sad Journal of Mathematics: 40(3), 75-81.
Gouveia, M. J.
(2010)
A note on profinite completions and canonical extensions
Algebra Universalis: 64(1-2), 21-23.
Araújo, João
; Dobson, Edward; Konieczny, Janusz (2010)
Automorphisms of Endomorphism Semigroups of Reflexive Digraphs
Mathematische Nachrichten: 283(7), 1-26.
Lehtonen, Erkko
(2010)
Characterization of preclones by matrix collections
Asian-European Journal of Mathematics: 3(3), 457-473.
Lehtonen, Erkko
(2010)
Closed classes of functions, generalized constraints, and clusters
Algebra Universalis: 63(2-3), 203-234.
Foldes, Stephan;
Lehtonen, Erkko
(2010)
Column-partitioned matrices over rings without invertible transversal submatrices
Ars Combinatoria: 97, 33-39.
Medeiros, Paulo
(2010)
Compatible total orders on bisimple inverse w-semigroups
Semigroup Forum - Volume 81: Issue1, 200-216.
Araújo, João
; McCune, William (2010)
Computer Solutions of Problems in Inverse Semigroups
Communications in Algebra: 38(3), 1104-1121.
Araújo, João
; Bunau, P. V.; Mitchell, James D.; Neunhoeffer, M. (2010)
Computing Automorphisms of Semigroups
Journal of Symbolic Computation: 45(3), 373-392.
Branco, Mário J. J.
; Gould, Victoria;
Gomes, Gracinda M. S.
(2010)
Extensions and covers for semigroups whose idempotents form a left regular band
Semigroup Forum: 81, 51-70.
Matucci, Francesco
(2010)
Mather invariant in groups of piecewise-linear homeomorphisms
Trends in Mathematics, Combinatorial and Geometric Group Theory, 251-260.
Lehtonen, Erkko
; Nešetril, Jaroslav (2010)
Minors of Boolean functions with respect to clique functions and hypergraph homomorphisms
European Journal of Combinatorics: 31(8), 1981-1995.
Bentz, Wolfram
(2010)
Optimal Packings of 13 and 46 Unit Squares in a Square
Electronic Journal of Combinatorics: 17 (2), #R126.
Lehtonen, Erkko
; Szendrei, Ágnes (2010)
The submaximal clones on the three-element set with finitely many relative R-classes
Discussiones Mathematicae - General Algebra and Applications: 30(1), 7-33.
Araújo, João
; Konieczny, Janusz (2009)
Automorphisms of Endomorphism Monoids of 1-Simple Free Algebras
Communications in Algebra: 37(1), 83-94.
Martins, Rachel
(2009)
Categorified noncommutative manifolds
International journal of modern physics A: 24(15), 2802-2819.
Fernandes, Vítor Hugo;
Gomes, Gracinda M. S.
; Jesus, Manuel M. (2009)
Congruences on monoids of transformations preserving the orientation on a finite chain
Journal of Algebra: 321(3), 743–757.
Gillibert, Pierre
(2009)
Critical points of pairs of varieties of algebras
International Journal of Algebra and Computation: 19(1), 1-40.
Araújo, João
; Wehrung, Friedrich (2009)
Embedding properties of endomorphism semigroups
Fundamenta Mathematicae: 202, 125-146.
Branco, Mário J. J.
; Pin, J.-E. (2009)
Equations defining the polynomial closure of a lattice of regular languages
Lecture Notes in Computer Science: 5556, 115-126.
Lehtonen, Erkko
; Szendrei, Ágnes (2009)
Equivalence of operations with respect to discriminator clones
Discrete Mathematics: 309(4), 673-685.
Matucci, Francesco
(2009)
Finite solvable groups whose Quillen complex is Cohen-Macaulay
Journal of Algebra: 322(4), 969-982.
Araújo, João
; Konieczny, Janusz (2009)
General Theorems on Automorphisms of Semigroups and Their Applications
Journal of the Australian Mathematical Society: 87(1), 1-17.
Couceiro, Miguel;
Lehtonen, Erkko
(2009)
Generalizations of Swierczkowski's lemma and the arity gap of finite functions
Discrete Mathematics: 309(20), 5905-5912.
Mermut, Engin;
Santa-Clara, Catarina
; Smith, Patrick F. (2009)
Injectivity Relative to Closed Submodules
Journal of Algebra: 321(2), 548-557.
Fountain, John;
Gomes, Gracinda M. S.
; Gould, Victoria (2009)
Membership of AvG for classes of finite weakly abundant semigroups
Periodica Mathematica Hungarica: 59(1), 9-36.
Soares, Filipa
; McAlister, D. B. (2009)
One-dimensional tiling semigroups and factorial languages
Communications in Algebra: 37(1), 276-295.
Fountain, John;
Gomes, Gracinda M. S.
; Gould, Victoria (2009)
The free ample monoid
International Journal of Algebra and Computation: 19(4), 527-554.
Branco, Mário J. J.
;
Gomes, Gracinda M. S.
(2009)
The generalized Szendrei expansion of an R-unipotent semigroup
Acta Mathematica Hungarica: 123(1-2), 11-26.
Araújo, João
; Schneider, Csaba (2009)
The Rank of the Endomorphism Monoid of a Uniform Partition
Semigroup Froum: 78(3), 498-510.
Matucci, Francesco
(2008)
Cryptanalysis of the Shpilrain-Ushakov Protocol in Thompson's Group
Journal of Cryptology: 21(3), 458--468.
Gomes, Gracinda M. S.
; Gould, Victoria (2008)
Fundamental semigroups having a band of idempotents
Semigroup Forum: 77, 279-299.
Lehtonen, Erkko
(2008)
Labeled posets are universal
European J. Combin.: 29, 493-506.
Kinyon, M.
; Phillips, J. D.; Vojtechovsky, P. (2008)
When is the commutant of a Bol loop a subloop?
Transactions of the American Mathematical Society: 360(5), 2393-2408.
Bentz, Wolfram
(2007)
A Characterization of T3 Separation for a Special Class of Varieties
Algebra Universalis: 56, 399 – 410.
Araújo, João
; Konieczny, Janusz (2007)
A Method of Finding Automorphism Groups of Endomorphism Monoids of Relational Systems
Discrete Mathematics: 307, 1609-1620.
Gomes, Gracinda M. S.
; Maria B. Szendrei (2007)
Almost factorizable weakly ample semigroups
Communications in Algebra: 35 (11), 3503-3523.
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CEMAT
- Center for Computational and Stochastic Mathematics
Instituto Superior Têcnico
Faculdade de Ciências
Universidade de Lisboa