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Artigos em Revistas Internacionais
Gomes, Gracinda M. S.
; Ana-Catarina C. Monteiro (2024)
Formations and i-Fitting classes of inverse semigroups, congruences and languages
Semigroup Forum: 109 (1), 87-115.
Gomes, Gracinda M. S.
; Ana-Catarina C. Monteiro (2023)
Formations of orthodox semigroups
Semigroup Forum: 107, 651–679.
Gomes, Gracinda M. S.
; Nobre, Isabel J. (2022)
Formations of inverse semigroups
Semigroup Forum: 105, 217–243.
Gomes, Gracinda M. S.
; Bernardo H. Fernandes (2021)
omega sharp algebras
Communications in Algebra: 49 (9), 3969–3999.
Gomes, Gracinda M. S.
; Bernardo H. Fernandes (2021)
A topological shuttle between inequalities and pseudoinequalities
Semigroup Forum: 102, no. 3, 916–924.
Gouveia, M. J.
;
Lehtonen, Erkko
(2021)
Permutation reconstruction from a few large patterns
Electronic Journal of Combinatorics: 28(3), #P3.41.
Ghilardi S.;
Gouveia, M. J.
; Santocanale L (2019)
Fixed-Point Elimination in the Intuitionistic Propositional Calculus
ACM Transactions on Computational Logic: 21(1), 1-37.
Branco, Mário J. J.
;
Gomes, Gracinda M. S.
; Silva, Pedro V. (2019)
On the semigroup rank of a group
Semigroup Forum: 99, 568-578.
Araújo, João
;
Gomes, Gracinda M. S.
;
Bentz, Wolfram
(2018)
Congruences on direct products of transformation and matrix monoids
Semigroup Forum: 97, 384-416.
Branco, Mário J. J.
;
Gomes, Gracinda M. S.
; Gould, Victoria; Wang, Yanhui (2018)
Ehresmann monoids: adequacy and expansions
Journal of Algebra: 513, 344-367.
Soares, Filipa
; Silva, Pedro V.; Volkov, Mikhail V. (2018)
Local finiteness for Green's relations in semigroup varieties
Communications in Algebra: 40 (10), 4625-4653.
Branco, Mário J. J.
;
Gomes, Gracinda M. S.
; Silva, Pedro V. (2017)
Takahasi semigroups
Forum Mathematicum: 29(5), 1145-1161.
Soares, Filipa
; Silva, Pedro V. (2016)
Howson's Property for Semidirect Products of Semilattices by Groups
Communications in Algebra: 44, 2482-2494.
Branco, Mário J. J.
;
Gomes, Gracinda M. S.
; Gould, Victoria (2015)
Ehresmann monoids
J. Algebra: 443, 349–382.
Gomes, Gracinda M. S.
;
Santa-Clara, Catarina
;
Soares, Filipa
(2015)
The semigroup ring of a restriction semigroup with an inverse skeleton
Semigroup Forum: 90 (2015), no. 2, 449–474.
Craig, A.;
Gouveia, M. J.
; Haviar, M. (2015)
TiRS graphs and TiRS frames: a new setting for duals of canonical extensions
, (in press).
Gouveia, M. J.
; Priestley, H. A. (2014)
Canonical extensions and profinite completions of semilattices and lattices
Order: 31(2), 189-216.
Gomes, Gracinda M. S.
; Ruskuc, Nik (2014)
John Macintosh Howie: Work and Legacy
Semigroup Forum: 89(1), 2-19.
Bentz, Wolfram
;
Sequeira, Luís
(2014)
Taylor's modularity conjecture holds for linear idempotent varieties
Algebra Universalis: 71(2), 101-107.
Gouveia, M. J.
; Priestley, H. A. (2013)
Profinite completions and canonical extensions of semilattice reducts of distributive lattices
Houston J. Math.: 39(4), 1117-1136.
Branco, Mário J. J.
;
Gomes, Gracinda M. S.
; Gould, Victoria (2011)
Left adequate and left Ehresmann monoids
International Journal of Algebra and Computation: 21(7), 1259-1284.
Gomes, Gracinda M. S.
; Gould, Victoria (2011)
Left adequate and left Ehresmann monoids II
Journal of Algebra: 348(1), 171-195.
Davey, B. A.;
Gouveia, M. J.
; Haviar, M.; Priestley, H. A. (2011)
Multisorted dualisability: change of base
Algebra Universalis: 66(4), 331-336.
Davey, B.;
Gouveia, M. J.
; Haviar, M.; Priestley, H. A. (2011)
Natural extensions and profinite completions of algebras
Algebra Universalis: 66(3), 205-241.
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.
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.
Gouveia, M. J.
(2010)
A note on profinite completions and canonical extensions
Algebra Universalis: 64(1-2), 21-23.
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.
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.
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.
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.
Gomes, Gracinda M. S.
; Gould, Victoria (2008)
Fundamental semigroups having a band of idempotents
Semigroup Forum: 77, 279-299.
Gomes, Gracinda M. S.
; Maria B. Szendrei (2007)
Almost factorizable weakly ample semigroups
Communications in Algebra: 35 (11), 3503-3523.
Branco, Mário J. J.
(2007)
Deterministic concatenation product of languages recognized by finite idempotent monoids
Semigroup Forum: 74, n. 3, 379-409.
Gomes, Gracinda M. S.
; Szendrei, Maria B. (2007)
Even covers of left ample semigroups
Semigroup Forum: 74(2), 293-305.
Fountain, John B.;
Gomes, Gracinda M. S.
(2006)
Finite abundant semigroups in which the idempotents form a subsemigroup
Journal of Algebra: 295, 303-313.
Gomes, Gracinda M. S.
; Pin, J.-E.; Sezinando, Helena (2006)
Presentations of the Schützenberger product of n groups
Communications in Algebra: 34 (4), 1213-1235.
Fountain, J.B.;
Gomes, Gracinda M. S.
(2006)
Proper covers of ample monoids
Proc. Edinb. Math. Soc.: 49, 277-289.
Gomes, Gracinda M. S.
(2006)
The generalized prefix expansion of a weakly left ample semigroup
Semigroup Forum: 72 (3), 387-403.
Branco, Mário J. J.
(2006)
Two algebraic approaches to variants of the concatenation product
Theoret. Comput. Sci.: 369, 406-426.
Fernandes, Vítor Hugo;
Gomes, Gracinda M. S.
; Jesus, Manuel M. (2005)
Congruences on monoids of order-preserving or order-reversing transformations on a finite chain
Glasgow Mathematical Journal: 47, 413-424.
Fernandes, Vítor Hugo;
Gomes, Gracinda M. S.
; Jesus, Manuel M. (2005)
Presentations for some monoids of partial transformations on a finite chain
Communications in Algebra: 33, 587-604.
Gomes, Gracinda M. S.
(2005)
Proper extensions of weakly left ample semigroups
Acta Math Hungarica: 109 (1-2), 33-51.
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CEMAT
- Center for Computational and Stochastic Mathematics
Instituto Superior Têcnico
Faculdade de Ciências
Universidade de Lisboa