# António Malheiro

## Associate Professor w/ habilitation, Mathematics Department

Faculdade de Ciências e Tecnologia UNL, Monte da Caparica, 2829-516 Caparica, Tel: (+351) 212948388 ext. 10832 (email)

Faculdade de Ciências e Tecnologia UNL, Monte da Caparica, 2829-516 Caparica, Tel: (+351) 212948388 ext. 10832 (email)

**At conferences**

- Crystals for Plactic-like monoids (July 26, 2017) - Invited talk: All Kinds of Mathematics Remind me of You, Conference to celebrate the 70th Anniversary of Peter J. Cameron, Lisbon, Portugal.
- Identities in plactic and related monoids. (June 15, 2017) - 94th Workshop on General Algebra - AAA94, in conjunction with the 5th Novi Sad Algebraic Conference - NSAC 2017, Novi Sad, Serbia.
- Crystallizing the hypoplactic monoid. (July 14, 2016) – Invited talk: 6th Combinatorics Day, UNL, Lisbon, Portugal.
- On the complexity of the word problem for the Plactic monoid (Jul. 11–13, 2016) – Algebra and Combinatorics session at the “Encontro Nacional da Sociedade Portuguesa de Matemática 2016”, Barreiro, Portugal.
- A complete rewriting system for the Plactic monoid using crystals (May 26, 2016) – Invited talk: 10th Workshop on Statistics, Mathematics and Computation, Tomar, Portugal.
- Computing conjugacy in homogeneous monoids (Dec. 14–15, 2015) – Invited talk: 9th Workshop on Statistics, Mathematics and Computation, Lisbon, Portugal.
- CAUL, crystals, tableaux and the Plactic monoid (Nov. 20, 2014) – Algebra Workshop 2014 – 34 years of CAUL, Lisbon, Portugal.
- Conjugacy in semigroups: a rewriting perspective (Jul. 5, 2013) – Invited talk: Summer Workshops CAUL: Algebraic structures and semigroups, Lisbon, Portugal.
- On ﬁnite complete presentations and exact decompositions of semigroups (May 25, 2012) – Invited talk: Workshop on Semigroups (To remember John M. Howie on the occasion of his 76th birthday), Lisbon, Portugal.
- Condições ﬁnitas em apresentações de monoides (Sep. 17, 2010) – Encontro de Algebristas Portugueses, University of Beira Interior, Covilhã, Portugal.
- On ﬁnite complete rewriting systems and regular semigroups (Jul. 1, 2010) – Invited talk: Workshop on Algebra 2010, Lisbon, Portugal.
- Complete rewriting systems and homotopy bases in semigroup theory (Jul. 6, 2009) – International Conference on Semigroups and related topics, Porto, Portugal.
- On Finite Derivation Type and Subgroups of Monoids (Apr. 24, 2009) – Invited talk: Workshop "Groups, Semigroups and Applications", CAUL, Lisbon, Portugal.
- On ﬁnite complete rewriting systems and completely 0-simple semigroups (Oct. 4, 2008) – Invited talk: II Iberian Mathematical Meeting, Badajoz, Spain.
- On Finite Derivation Type and Subsemigroups (Jul. 12, 2005) – Invited talk: International Conferenceon Semigroups and Languages in honour of the 65th birthday of Donald B. McAlister, CAUL, Lisbon, Portugal.

- Conjugation in semigroups April 20, 2017 – Algebra Seminar, Faculty of Mathematics, Informatics and Mechanics, Warsaw University.
- Crystals, tableaux, and the (hypo)plactic monoid Oct. 27, 2016 – Algebra Seminar, Faculty of Mathematics, Informatics and Mechanics, Warsaw University.
- On the decidability of conjugacy for homogeneous monoids Apr. 29, 2016 – Algebra Seminar, CEMAT – Centre for Computational and Stochastic Mathematics, University of Lisbon.
- An overview over conjugacy in semigroups Apr. 13, 2016 – Joint seminar “Álgebra e Combinatória” and “Álgebra, Lógica e Topologia”, University of Coimbra.
- An overview over conjugacy in semigroups Dec. 4, 2015 – Seminar of “Semigroups, Automata and Languages”, University of Porto.
- Sobre autómatos sincronizantes Oct. 7, 2015 – Seminar of “Álgebra e Lógica”, New University of Lisbon. – Co-presented with Jorge Orestes Cerdeira.
- Conjugação em semigrupos sob a perspectiva dos sistemas de reescrita Jan 17, 2014 – Seminar of “Álgebra e Lógica”, New University of Lisbon.
- Sistemas de reescrita em semigrupos 0-univocamente factorizáveis Mar. 20, 2009 – Seminar of “Semigroups, Automata and Languages”, University of Porto.
- Sistemas de reescrita em semigrupos completamente simples May 15, 2008 – University of Évora.
- Sistemas de reescrita e transversais ﬁnitas de semigrupos Feb. 8, 2008 – Seminar of “Álgebra,LógicaeComputação”, Centre for Mathematics of the University of Minho.
- Sistemas de reescrita e Bases de Gröbner May 19, 2006 – Seminar of Algebra, Centre for Algebra of the University of Lisbon (CAUL).
- Apresentações completas para submonóides Jan. 7, 2005 – Algebra Seminar, Centre for Algebra of the University of Lisbon (CAUL).
- O pacote semigrupos do Mathematica Oct. 2002 – Seminar of the Project “Semigroups and Languages”, Centre for Algebra of the University of Lisbon (CAUL).
- As funções de Dehn de um monoide Oct. 18, 2002, – Algebra Seminar, Centre for Algebra of the University of Lisbon (CAUL).
- Extensões de monoides e sistemas de reescrita completos Oct. 12, 2001 – Seminar of the Project “Semigroups and Languages”, Centre for Algebra of the University of Lisbon (CAUL).
- Apresentações completas para submonoides 2001 – Seminar of the Project “Semigroups and Languages”, Centre for Algebra of the University of Lisbon (CAUL).
- Sistemas de reescrita completos Dec. 17, 1999 – Seminar of the Project “Semigroups and Languages”, Centre for Algebra of the University of Lisbon (CAUL).
- Monoides inversos E*-unitários Jun., 1999 – Masters Seminar, University of Lisbon.
- Coberturas E-unitárias de semigrupos inversos 1999 – Seminar of the Project “Semigroups and Languages”, Centre for Algebra of the University of Lisbon (CAUL).
- Semigrupos inversos Jan., 1998 – Seminar of the Project “Semigroups and Languages”, Centre for Algebra of the University of Lisbon (CAUL).