Algebra|Coalgebra Seminar

[News & Future Meetings]  [Previous Meetings]   [Contact]  

This page concerns the Algebra|Coalgebra Seminar at the Institute for Logic, Language & Computation (ILLC) of the University of Amsterdam. The purpose of the seminar is to disseminate results and insights about and around algebraic and coalgebraic methods in logic.

News & Future meetings

    Speaker: Andrey Kudinov (HSE Moscow)

    Title: Modal logics of the real line

    Coordinates: Wednesday, 14 December, 2016 at 17:00 in room G2.02, Science Park 904, Amsterdam.


    The real line is probably the most well known and well studied topological space. There are 6 different combinations of languages of this kind (two unimodal and four bimodal). The first modality in bimodal and the modality in unimodal languages we will interpret either using closure or derivation topological operators. For the second modality in bimodal settings we use universal or difference modalities. We will discuss logics of the real line that arise in all these languages.

Previous Meetings

  • Title: Nominal Sets in Constructive Set Theorys
    Speaker: Andrew Swan (ILLC)
    Date: Wednesday, 9 November.

  • Title: Some model theory for the modal mu-calculus
    Speaker: Yde Venema (ILLC)
    Date: Wednesday, 26 October.

  • Title: On generalized Van-Benthem-type characterizations
    Speaker: Grigory Olkhovikov (Ruhr-Universitaet Bochum, Institut fuer Philosophie II)
    Date: Wednesday, 28 September.

  • Title: Bitopology and four-valued logic
    Speaker: Tomáš Jakl (Charles University, Prague and University of Birmingham)
    Date: Wednesday, 4 May, 2016.

  • Title: MV-algebras and the Pierce-Birkhoff conjecture
    Speaker: Serafina Lapenta (University of Salerno)
    Date: Wednesday, 20 April, 2016.

  • Title: Studying profinite semigroups via logic
    Speaker: Sam van Gool (CUNY City College and ILLC)
    Date: Wednesday, 30 March, 2016.

  • Title: Investigations on Gödel’s incompleteness properties for guarded fragment and other decidable versions of FOL
    Speaker: Mohamed Khaled (Central European University, Budapest)
    Date: Wednesday, 16 March, 2016.

  • Title: Subminimal Logics of Negation
    Speaker: Almudena Colacito (ILLC)
    Date: Wednesday, 9 March, 2016.

  • Title: Weak Subintuitionistic Logic
    Speaker: Fatemeh Shirmohammadzadeh Maleki (Shahid Beheshti University, Tehran and ILLC)
    Date: Wednesday, 24 February, 2016.

  • Title: Monadic second order logic as the model companion of temporal logic
    Speaker: Silvio Ghilardi (University of Milan)
    Date: Wednesday, 27 January, 2016.

  • Title: Duality for Non-monotonic Consequence Relations and Antimatroids
    Speakers: Joahnnes Marti and Riccardo Pinosio (ILLC)
    Date: Wednesday, 2 December, 2015.

  • Title: Some open problems concerning MSO for coalgebras
    Speaker: Sebastian Enqvist (ILLC)
    Date: Wednesday, 18 November, 2015.

  • Title: Derivative and counting operators on topological spaces
    Speaker: Alberto Gatto (Imperial College London)
    Date: Wednesday, 18 November, 2015.

  • Title: Coalgebraic many-valued logics
    Speaker: Marta Bílková (Charles University in Prague)
    Date: Wednesday, 4 November, 2015.

  • Title: The Wellfounded Parts of Final Coalgebras are Initial Algebras
    Speaker: Larry Moss (Indiana University Logic Program and Math department)
    Date: Wednesday, 8 July, 2015.

  • Title: Stable canonical rules: bounded proofs, dichotomy property and admissible bases
    Speaker: Silvio Ghilardi (University of Milan)
    Date: Wednesday, 27 May, 2015.

  • Title: Stone duality above dimension zero
    Speaker: Vincenzo Marra (University of Milan)
    Date: Wednesday, 27 April, 2015.

  • Title: Modal logic of topology
    Speaker: Nick Bezhanishvili (ILLC) and Jan van Mill (KdVI)
    Date: Wednesday, 15 April, 2015.

  • Title: Global caching for the alternation-free coalgebraic mu-calculus
    Speaker: Daniel Hausmann (Friedrich-Alexander University of Erlangen and Nurnberg)
    Date: Wednesday, 1 April, 2015.

  • Title: Dependency as question entailment
    Speaker: Ivano Ciardelli (ILLC, University of Amsterdam)
    Date: Wednesday, 18 March, 2015.

  • Title: Up-to techniques for bisimulations with silent moves
    Speaker: Daniela Petrişan (Raboud University, Nijmegen)
    Date: Wednesday, 4 March, 2015.

  • Title: Strong Completeness for Iteration-free Coalgebraic Dynamic Logics.
    Speaker: Helle Hansen (TU Delft)
    Date: Wednesday, 18 February, 2015.

  • Title: Residuated Basic Algebras
    Speaker: Minghui Ma (Southwest University)
    Date: Wednesday, 4 February, 2015.

  • Title: Non-self-referential realizable frangments of modal and intuitionistic logics
    Speaker: Junhua Yu (Tsinghua University)
    Date: Wednesday, 21 January, 2015.

  • Title: Modal Logics for Presheaf Categories
    Speaker: Giovanni Cina (ILLC, University of Amsterdam)
    Date: Wednesday, 3 December, 2014.

  • Title: Completeness and Incompleteness in Nominal Kleene Algebra
    Speaker: Dexter Kozen (Cornell University)
    Date: Wednesday, 26 November, 2014.

  • Title: Polyhedra: from geometry to logic
    Speaker: Andrea Pedrini (University of Milan)
    Date: Wednesday, 5 November, 2014.

  • Title: Exact Unification Type and Admissible rules
    Speaker: Leonardo Cabrer (University of Florence, Italy)
    Date: Wednesday, 29 October, 2014.

  • Title: PDL has Craig Interpolation since 1981
    Speaker: Malvin Gattinger (ILLC, University of Amsterdam)
    Date: Wednesday, 1 October, 2014.

  • Title: Changing a Semantics: Opportunism, or Courage?
    Speaker: Johan van Benthem (ILLC, University of Amsterdam)
    Date: Wednesday, 17 September, 2014.

  • Title: Axiomatizations of intermediate logics via the pseudo-complemented lattice reduct of Heyting algebras
    Speaker: Julia Ilin (ILLC, University of Amsterdam)
    Date: Wednesday, 11 June, 2014.

  • Title: Duality and canonicity for Boolean algebra with a relation
    Speaker: Sumit Sourabh (ILLC, University of Amsterdam)
    Date: Wednesday, 11 June, 2014.

  • Title: Adding the Supremum to Interpretability Logic
    Speaker: Paula Henk (ILLC, University of Amsterdam)
    Date: Wednesday, 28 May, 2014.

  • Title: Duality for Logic of Quantum Actions
    Speaker: Shengyang Zhong (ILLC, University of Amsterdam)
    Date: Wednesday, 28 May, 2014.

  • Title: Many-valued modal logic over residuated lattices via duality (joint work with Andrew Craig - University of Johannesburg)
    Speaker: Umberto Rivieccio (Delft University of Technology)
    Date: Wednesday, 14 May, 2014.

  • Title:Using Admissible Rules to Characterise Logics
    Speaker: Jeroen Goudsmit (Utrecht University)
    Date: Wednesday, 30 April, 2014.

  • Title:Uniform Interpolation for Coalgebraic Fixpoint Logic
    Speaker: Fatemeh Seifan (ILLC, University of Amsterdam)
    Date: Wednesday, 30 April, 2014.

  • Title:Free algebras for Gödel-Löb provability logic
    Speaker: Sam van Gool (LIAFA, Université Paris-Diderot & Radboud Universiteit Nijmegen)
    Date: Wednesday, 16 April, 2014.

  • Title: Canonical rules for modal logic
    Speaker: Nick Bezhanishvili (ILLC, University of Amsterdam)
    Date: Thursday, 20 March, 2014.

  • Title: From free algebras to proof bounds.
    Speaker: Silvio Ghilardi (University of Milano)
    Date: Thursday, 20 February, 2014.

  • Title: Cut-elimination in circular proofs.
    Speaker: Jérôme Fortier (UQAM / AMU)
    Date: Thursday, 20 February, 2014.

  • Title: Open maps, small maps and final coalgebras.
    Speaker: Benno van den Berg (ILLC, University of Amsterdam)
    Date: Thursday, 6 February, 2014.

  • Title: A coalgebraic view of characteristic formulas in equational modal fixed point logics.
    Speaker: Sebastian Enqvist (ILLC, University of Amsterdam)
    Date: Wednesday, 22 January, 2014.

  • Title: Coalgebriac Announcement Logics
    Speaker: Facundo Carreiro (ILLC, University of Amsterdam)
    Date: Wednesday, 4 December, 2013.

  • Title: An algebraic approach to cut-elimination for substructural logics.
    Speaker: Sumit Sourabh (ILLC, University of Amsterdam)
    Date: Wednesday, 20 November, 2013.

  • Title: Terminal Sequences and Their Coalgebras.
    Speaker: Johannes Marti (ILLC, University of Amsterdam)
    Date: Wednesday, 31 October, 2013.

  • Title: Two isomorphism criteria for directed colimits.
    Speaker: Luca Spada (ILLC, Amsterdam and University of Salerno)
    Date: Wednesday, 9 October, 2013.

  • Title: A non-commutative Priestly duality
    Speaker: Sam van Gool (Radbound University, Nijmegen)
    Date: Wednesday February 13, 2013

  • Title: Bilattices with modal operators
    Speaker: Speaker: Umberto Rivieccio (University of Birmingham)
    Date: Wednesday May 30, 2012

  • Title: Topological- and Neighborhood-Sheaf Semantics for First-Order Modal Logic
    Speaker: Kohei Kishida (ILLC, Amsterdam)
    Date: Wednesday May 23, 2012

    A|C seminar in 2009/2010
    A|C seminar in 2008/2009
    A|C seminar in 2007/2008
    A|C seminar in 2006/2007

  • Contact

    The seminar is currently organized by Julia Ilin, Nick Bezhanishvili, and Frederik Lauridsen. If you're interested in giving a talk at the seminar please contact Julia at ilin.juli[at] or Frederik at f.m.lauridsen[at]

    If you want to subscribe to the A|C seminar mailing list please send an email to Frederik at f.m.lauridsen[at] with the subject "A|C seminar".