Talks

Conference talks

1. The cardinalities of clonoid lattices of Boolean functions (keynote speaker) [slides]
   19th International Conference of Young Algebraists in Thailand (ICYAT 2026), Mahasarakham University, Maha Sarakham, Thailand, 25–27 Mar. 2026
2. The cardinalities of clonoid lattices of Boolean functions [slides]
   107th Workshop on General Algebra (AAA107), Bern, Switzerland, 20–22 June 2025
3. Permutation groups and permutation patterns (keynote speaker) [slides]
   18th International Conference of Young Algebraists in Thailand (ICYAT 2025), Silpakorn University, Nakhon Pathom, Thailand, 14–16 May 2025
4. On the cardinalities of lattices of clonoids [slides]
   105th Workshop on General Algebra (AAA105), Prague, Czech Republic, 31 May – 2 June 2024
5. On clonoids of Boolean functions (keynote speaker) [slides]
   17th International Conference of Young Algebraists in Thailand (ICYAT2024), Rajamangala University of Technology Isan, Khon Kaen, Thailand, 21–23 Mar. 2024
6. Permutation groups and permutation patterns
   UAE Math Day 2024, New York University Abu Dhabi, United Arab Emirates, 2 Mar. 2024
7. On clonoids of Boolean functions (invited plenary lecture) [slides]
   104th Workshop on General Algebra (AAA104), Blagoevgrad, Bulgaria, 8–11 Feb. 2024
8. Near-unanimity-closed minions of Boolean functions [slides]
   103rd Workshop on General Algebra (AAA103), Tartu, Estonia, 9–11 June 2023
9. Associative spectra of graph algebras (keynote speaker) [slides]
   16th International Conference of Young Algebraists in Thailand (16th ICYAT-MJU), Maejo University, Chiang Mai, Thailand, 24–25 Mar. 2023
10. Reconstructing Young tableaux
    Encontro Nacional da Sociedade Portuguesa de Matemática (ENSPM 2022), Tomar, Portugal, 18–20 July 2022
11. On clonoids of Boolean functions
    102nd Workshop on General Algebra (AAA102), Szeged, Hungary, 24–26 June 2022
12. Reflections and powers of multisorted minions
    Honorary colloquium on the occasion of Reinhard Pöschel’s 75th birthday, Dresden, Germany, 9 June 2022
13. Associative spectra of groupoids
    Finnish Mathematical Days 2022, Tampere, Finland (online), 4–5 Jan. 2022
14. Permutation groups and permutation patterns
    Permutation Patterns 2021 Virtual Workshop (PP2021), University of Strathclyde, Glasgow, United Kingdom (online), 15–16 June 2021
15. On clonoids of Boolean functions
    100th Workshop on General Algebra (AAA100), Kraków, Poland (online), 5–7 Feb. 2021
16. Linearly definable classes of Boolean functions
    Algebras, Graphs and Ordered Sets (ALGOS 2020), Nancy, France (online), 26–28 Aug. 2020
17. Associative spectra of graph algebras
    99th Workshop on General Algebra (AAA99), Siena, Italy, 21–23 Feb. 2020
18. Associative spectra of graph algebras
    97th Workshop on General Algebra (AAA97), Vienna, Austria, 1–3 Mar. 2019
19. Functions with a unique identification minor
    96th Workshop on General Algebra (AAA96), Darmstadt, Germany, 1–3 June 2018
20. Minors of multisorted functions and reflections
    95th Workshop on General Algebra (AAA95), Bratislava, Slovakia, 9–11 Feb. 2018
21. Reflection-closed varieties of multisorted algebras and minor identities II
    94th Workshop on General Algebra (AAA94) and 5th Novi Sad Algebraic Conference (NSAC 2017), Novi Sad, Serbia, 15–18 June 2017
22. Patterns and minors of permutations
    93rd Workshop on General Algebra (AAA93), Bern, Switzerland, 10–12 Feb. 2017
23. Permutation classes closed under pattern involvement and composition
    54th Summer School on General Algebra and Ordered Sets (SSAOS 2016), Trojanovice, Czech Republic, 3–9 Sept. 2016
24. Permutation classes closed under pattern involvement and composition
    92nd Workshop on General Algebra (AAA92), Prague, Czech Republic, 27–29 May 2016
25. Reconstructing functions and unique identification minors
    91st Workshop on General Algebra (AAA91), Brno, Czech Republic, 5–7 Feb. 2016
26. Reconstructing functions from identification minors
    Finnish Mathematical Days 2016, Turku, Finland, 7–8 Jan. 2016
27. Order of first occurrence and minors of functions
    Colloquium on Combinatorics (KolKom 2015), Ilmenau, Germany, 6–7 Nov. 2015
28. Finite characterizability of equational classes of threshold functions
    Algebra Workshop 2014 — 34 years of CAUL, Lisbon, Portugal, 19–21 Nov. 2014
29. Reconstructing functions from identification minors
    Workshop on Computational Algebra 2014, Lisbon, Portugal, 21–23 July 2014
30. Finite characterizability of equational classes of threshold functions
    Algebras & Clones fest, Prague, Czech Republic, 30 June – 3 July 2014
31. Associativity, preassociativity, and string functions
    88th Workshop on General Algebra (AAA88), Warsaw, Poland, 19–22 June 2014
32. Reconstructing functions from identification minors
    4th Novi Sad Algebraic Conference (NSAC 2013), Novi Sad, Serbia, 5–9 June 2013
33. Reconstructing functions from identification minors
    86th Workshop on General Algebra (AAA86), Olomouc, Czech Republic, 30 May – 2 June 2013
34. Reconstructing functions of several arguments from identification minors
    Colloquium on Combinatorics (KolKom 2012), Berlin, Germany, 16–17 Nov. 2012
35. Generalized entropy in algebras with neutral element and in inverse semigroups
    84th Workshop on General Algebra (AAA84), Dresden, Germany, 8–10 June 2012
36. The arity gap, or on the effect of identification of arguments on the essential arity of functions
    1st Joint Conference of the Belgian, Royal Spanish and Luxembourg Mathematical Societies (BSL-2012), Liège, Belgium, 6–8 June 2012
37. Gap vs. pag
    IEEE 42nd International Symposium on Multiple-Valued Logic (ISMVL 2012), Victoria, BC, Canada, 14–16 May 2012
38. Generalized entropy in algebras with neutral element and in inverse semigroups
    83rd Workshop on General Algebra (AAA83), Novi Sad, Serbia, 15–18 Mar. 2012
39. The arity gap, or on the effect of variable identification on the essential arity of functions
    Finnish Mathematical Days 2012, Lappeenranta, Finland, 4–5 Jan. 2012
40. Partial orders and equivalences induced by clones, especially by Post’s classes
    Second International Conference on Order, Algebra, and Logics (OAL2.0), Kraków, Poland, 6–10 June 2011
41. A survey on the arity gap
    IEEE 41st International Symposium on Multiple-Valued Logic (ISMVL 2011), Tuusula, Finland, 23–25 May 2011
42. Partial orders induced by the clones of Boolean clique functions and hypergraph homomorphisms
    Colloquium on Graph Theory & Applications, Luxembourg, Luxembourg, 25 Mar. 2011
43. Embeddability of countable posets with finite principal ideals into partial orders induced by clones
    81st Workshop on General Algebra (AAA81), Salzburg, Austria, 3–6 Feb. 2011
44. Commuting polynomial functions over distributive lattices
    Summer School on General Algebra and Ordered Sets (SSAOS 2010), Malenovice, Czech Republic, 4–10 Sept. 2010
45. Commuting polynomial functions over distributive lattices
    13th International Conference on Information Processing and Management of Uncertainty in Knowledge-Based Systems (IPMU 2010), Dortmund, Germany, 28 June – 2 July 2010
46. Commuting polynomial functions over distributive lattices
    International Conference on Algebras and Lattices (Jardafest), Prague, Czech Republic, 21–25 June 2010
47. Self-commuting lattice polynomial functions
    BLAST 2010, Boulder, CO, USA, 2–6 June 2010
48. Classes of operations closed under permutation, cylindrification and composition
    40th International Symposium on Multiple-Valued Logic (ISMVL 2010), Barcelona, Spain, 26–28 May 2010
49. Galois theories for function algebras
    Finnish Mathematical Days 2010, Jyväskylä, Finland, 4–5 Jan. 2010
50. Clones of Boolean clique functions and hypergraph homomorphisms
    3rd Novi Sad Algebraic Conference (NSAC 2009), Novi Sad, Serbia, 17–21 Aug. 2009
51. Reducts of Malʹcev’s iterative algebra and preservation of generalized relations
    78th Conference on General Algebra (AAA78), Bern, Switzerland, 11–14 June 2009
52. On the finite index property of clones
    77th Workshop on General Algebra (AAA77) & 24th Conference for Young Algebraists, Potsdam, Germany, 20–22 Mar. 2009
53. The arity gap and generalizations of Świerczkowski’s lemma
    Summer School on General Algebra and Ordered Sets (SSAOS 2008), Třešť, Czech Republic, 31 Aug. – 6 Sept. 2008
54. The arity gap of finite functions and generalizations of Świerczkowski’s lemma
    BLAST, Denver, CO, USA, 6–10 Aug. 2008
55. On the arity gap of finite functions: results and applications
    International Conference on Relations, Orders and Graphs: Interaction with Computer Science (ROGICS ’08), Mahdia, Tunisia, 12–17 May 2008
56. Operations on finite sets, functional composition, and ordered sets
    Finnish Mathematical Days 2008, Espoo, Finland, 3–4 Jan. 2008
57. Equivalence of operations with respect to discriminator clones
    74th Workshop on General Algebra (AAA74), Tampere, Finland, 7–10 June 2007
58. On homomorphisms of labeled posets
    73rd Workshop on General Algebra (AAA73) & 22nd Conference of Young Algebraists (CYA22), Klagenfurt, Austria, 1–4 Feb. 2007
59. Subfunctions and Burle’s clones
    Workshop Algebra and its applications, Kokõ, Estonia, 5–7 May 2006
60. Subfunction relations defined by the clones of monotone functions on a finite set
    Finnish Mathematical Days 2006 & 2nd Finnish-Estonian Mathematical Colloquium, Tampere, Finland, 4–5 Jan. 2006
61. Compositions of Boolean functions with monotone functions
    Novi Sad Algebraic Conference (NSAC ’05), Novi Sad, Serbia and Montenegro, 11–15 July 2005
62. Hypergraph homomorphisms and compositions of Boolean functions with clique functions
    Conference on Universal Algebra and Lattice Theory, Szeged, Hungary, 4–8 July 2005
63. On subfunctions of Boolean functions
    70th Workshop on General Algebra (AAA70), Vienna, Austria, 26–29 May 2005
64. On compositions of clones of Boolean functions
    International Conference of Computational Methods in Sciences and Engineering 2004 (ICCMSE 2004), Vouliagmeni, Attica, Greece, 19–23 Nov. 2004

Seminar talks

65. On the cardinalities of clonoid lattices of Boolean functions [slides]
    Mathematics Research Centre, Tampere University, Tampere, Finland, 20 Mar. 2026
66. The associative spectrum of a binary operation
    Mathematics Research Center, Azerbaijan State Oil and Industry University, Baku, Azerbaijan, 1 Dec. 2025
67. On clones and clonoids, especially those of Boolean functions [slides]
    Mathematics Department, Khalifa University, Abu Dhabi, United Arab Emirates, 18 Sept. 2025
68. On clones, minions, and clonoids, especially those of Boolean functions
    Center for Mathematics and Applications (NOVA Math), Faculty of Science and Technology, Universidade Nova de Lisboa, Caparica, Portugal, 11 July 2025
69. On clones, minions, and clonoids, especially those of Boolean functions [slides]
    Center for Computational and Stochastic Mathematics (CEMAT), University of Lisbon, Portugal, 8 July 2025
70. On clones, minions, and clonoids, especially those of Boolean functions
    Department of Mathematics, Instituto Superior Técnico, Lisbon, Portugal, 30 June 2025
71. On clones, minions, and clonoids, especially those of Boolean functions [slides]
    Department of Sciences and Engineering, Sorbonne University Abu Dhabi, United Arab Emirates, 8 Apr. 2025
72. On clonoids, especially those of Boolean functions
    Institute of Algebra, Dresden University of Technology, Germany, 7 June 2024
73. The associative spectrum of a binary operation [slides]
    Department of Mathematical Sciences, United Arab Emirates University, Al Ain, United Arab Emirates, 17 Nov. 2023
74. On clonoids of Boolean functions [slides]
    Panglobal Algebra and Logic Seminar (PALS), Department of Mathematics, University of Colorado at Boulder, USA (online), 17 Oct. 2023
75. Associative spectra of graph algebras
    Department of Mathematics and Statistics, American University of Sharjah, United Arab Emirates, 23 Nov. 2022
76. Associative spectra of graph algebras
    Seminar on Semigroups, Automata and Languages, Centre of Mathematics, University of Porto, Portugal (online), 11 Nov. 2022
77. Associative spectra of graph algebras
    Mathematics and Applications Colloquium, Mathematics Department, Khalifa University, Abu Dhabi, United Arab Emirates, 15 Sept. 2022
78. On clonoids of Boolean functions
    Institute for Algebra, Johannes Kepler University Linz, Austria, 31 Mar. 2022
79. On clonoids of Boolean functions
    Faculty of Information Technology and Communication Sciences, Tampere University, Finland (online), 14 Jan. 2022
80. On clonoids of Boolean functions
    MALOTEC Seminar, Loria (Laboratoire lorrain de recherche en informatique et ses applications), Vandœuvre-lès-Nancy, France (online), 16 Dec. 2021
81. On clonoids of Boolean functions
    Faculty of Science and Technology, Universidade Nova de Lisboa, Portugal (online), 29 Nov. 2021
82. On clonoids of Boolean functions
    Computer and Systems Laboratory (LIS), Aix-Marseille University, Marseille, France (online), 22 Nov. 2021
83. On clonoids of Boolean functions [slides]
    Department of Mathematics, University of Lisbon, Portugal (online), 16 Nov. 2021
84. Permutation groups and permutation patterns [slides]
    Institute of Mathematics and Informatics, Bulgarian Academy of Science, Sofia, Bulgaria (online), 5 Nov. 2021
85. Associative spectra of graph algebras
    MALOTEC Seminar, Loria (Laboratoire lorrain de recherche en informatique et ses applications), Vandœuvre-lès-Nancy, France (online), 6 May 2021
86. Associative spectra of graph algebras
    New York Combinatorics Seminar, The Graduate Center, City University of New York, USA (online), 12 Mar. 2021
87. Associative spectra of graph algebras
    Panglobal Algebra and Logic Seminar (PALS), Department of Mathematics, University of Colorado at Boulder, USA (online), 17 Nov. 2020
88. Associative spectra of graph algebras
    Faculty of Science and Technology, Universidade Nova de Lisboa, Portugal, 9 Mar. 2020
89. Permutation groups and permutation patterns
    Faculty of Science and Technology, Universidade Nova de Lisboa, Portugal, 4 Nov. 2019
90. Permutation groups and permutation patterns
    Faculty of Information Technology and Communication Sciences, Tampere University, Finland, 27 Sept. 2019
91. Permutation groups and permutation patterns
    Department of Mathematics and Statistics, University of Turku, Finland, 26 Sept. 2019
92. Permutation groups and permutation patterns
    Mathematics Research Unit, University of Luxembourg, Luxembourg, 26 Aug. 2019
93. Associative spectra of graph algebras
    Institute of Mathematics, University of Debrecen, Hungary, 25 Apr. 2019
94. Graph algebras and graph varieties
    Institute of Algebra, Dresden University of Technology, Germany, 19 Oct. 2018
95. Graph algebras and graph varieties
    Bolyai Institute, University of Szeged, Hungary, 26 Sept. 2018
96. Reflection-closed varieties of multisorted algebras and minor identities
    Institute of Mathematics, University of Potsdam, Germany, 28 May 2018
97. Reflection-closed varieties of multisorted algebras and minor identities
    Institute of Algebra, Dresden University of Technology, Germany, 9 June 2017
98. Permutation patterns, permutation groups, and invariance groups of functions
    Institute of Mathematics, University of Wrocław, Poland, 7 June 2017
99. Reconstructibility of functions and minors of permutations
    Bolyai Institute, University of Szeged, Hungary, 8 Mar. 2017
100. Majors of functions
     Institute of Algebra, Dresden University of Technology, Germany, 27 Jan. 2017
101. Minors of functions and permutations, reconstruction problems, and the order of first occurrence
     Institute of Algebra, Dresden University of Technology, Germany, 14 Oct. 2016
102. Permutation groups, pattern involvement, and Galois connections
     Institute of Mathematics, University of Potsdam, Germany, 12 May 2016
103. Permutation groups, pattern involvement, and Galois connections
     Institute of Discrete Mathematics and Algebra, Technische Universität Bergakademie Freiberg, Germany, 10 May 2016
104. Permutation groups, pattern involvement, and Galois connections
     Institute of Algebra, Dresden University of Technology, Germany, 15 Apr. 2016
105. On permutation groups and permutation pattern classes
     Bolyai Institute, University of Szeged, Hungary, 10 Feb. 2016
106. On permutation groups and permutation pattern classes
     Institute of Algebra, Dresden University of Technology, Germany, 18 Dec. 2015
107. On the reconstructibility of functions from identification minors
     Institute of Algebra, Dresden University of Technology, Germany, 22 May 2015
108. Homomorphisms of labeled posets
     Loria (Laboratoire lorrain de recherche en informatique et ses applications), Vandœuvre-lès-Nancy, France, 5 May 2015
109. Reconstructing functions from identification minors
     School of Information Sciences, University of Tampere, Finland, 9 Jan. 2015
110. Reconstructing functions from identification minors
     Centre of Mathematics, University of Porto, Portugal, 12 June 2014
111. Reconstructing functions of several arguments from identification minors
     Institute for Interdisciplinary Research, University of Lisbon, Portugal, 16 Dec. 2013
112. Recent advances in the reconstruction problem for functions and identification minors
     Mathematics Research Unit, University of Luxembourg, Luxembourg, 17 Apr. 2013
113. Commuting polynomial operations of distributive lattices
     Mathematics Research Unit, University of Luxembourg, Luxembourg, 22 Nov. 2012
114. Reconstructing functions of several arguments from identification minors
     Mathematics Research Unit, University of Luxembourg, Luxembourg, 18 Oct. 2012
115. Reconstruction problem for functions and identification minors
     Faculty of Mathematics and Information Sciences, Warsaw University of Technology, Poland, 12 June 2012
116. Generalized entropy in inverse semigroups and in algebras with neutral element
     Bolyai Institute, University of Szeged, Hungary, 29 Feb. 2012
117. Commuting polynomial operations of distributive lattices
     Mathematics and Statistics, School of Information Sciences, University of Tampere, Finland, 9 Sept. 2011
118. Commuting polynomial operations of distributive lattices
     Department of Algebra, Johannes Kepler University Linz, Austria, 16 Aug. 2011
119. Commuting polynomial operations of distributive lattices
     Institute of Mathematics, University of Miskolc, Hungary, 12 Aug. 2011
120. Commuting polynomial operations of distributive lattices
     Department of Mathematics and Informatics, University of Novi Sad, Serbia, 27 June 2011
121. Commuting polynomial operations of distributive lattices
     Institute of Mathematics, University of Rostock, Germany, 20 Apr. 2011
122. Commuting polynomial operations of distributive lattices
     Faculty of Mathematics and Information Sciences, Warsaw University of Technology, Poland, 1 Mar. 2011
123. Partial orders and equivalences induced by clones
     Bolyai Institute, University of Szeged, Hungary, 1 Dec. 2010
124. Partial orders and equivalences induced by clones
     Institute of Algebra, Dresden University of Technology, Germany, 14 Sept. 2010
125. How does identification of arguments affect the number of essential arguments of functions?
     Computer Science and Communication Research Unit, University of Luxembourg, Luxembourg, 17 June 2010
126. How does identification of variables affect the number of essential variables of functions?
     Department of Algebra, Johannes Kepler University Linz, Austria, 19 May 2010
127. Reducts of Malʹcev’s iterative algebra and generalizations of relations
     Department of Mathematics, University of Luxembourg, Luxembourg, 12 May 2009
128. Reducts of Malʹcev’s iterative algebras and generalizations of relations
     Department of Mathematics, State University of New York at New Paltz, USA, 8 Dec. 2008
129. A brief introduction to clone theory
     Department of Mathematics and Engineering, Harold Washington College, Chicago, IL, USA, 4 Dec. 2008
130. Reducts of Malʹcev’s iterative algebra and generalizations of relations
     Department of Mathematics & Statistics, McMaster University, Hamilton, Canada, 21 Oct. 2008
131. C-minors of operations and the arity gap
     Department of Mathematics, Brock University, St. Catharines, Canada, 24 Oct. 2007
132. Subfunction relations defined by function classes
     Department of Combinatorics and Optimization, University of Waterloo, Canada, 12 July 2006
133. Composition of Post classes and normal forms of Boolean functions
     RUTCOR — Rutgers Center for Operations Research, Piscataway, NJ, USA, 1 June 2006
134. Compositions of k-valued logic functions with monotone functions
     Institute of Mathematics, Tampere University of Technology, Finland, 16 Mar. 2006
135. Subfunction relations defined by function classes
     Department of Mathematics, University of Helsinki, Finland, 21 Oct. 2005
136. Subfunction relations defined by function classes
     Institute of Mathematics, Tampere University of Technology, Finland, 15 Sept. 2005
137. C-subfunctions of Boolean functions
     Institute of Mathematics, University of Miskolc, Hungary, 23 May 2005
138. Composition algebra of Boolean functions, functions of several variables, and function classes
     Institute of Mathematics, Tampere University of Technology, Finland, 2 Dec. 2004