Presentations, slides, etc.

For some of the conferences to which I participated, I used slides. In case anybody wants to have a look at these slides, I put them here for download.

download Banska Bystrica 2002 (pdf)

download Kosice 2003 (pdf).

Added notes: Meanwhile, the following problems of that set of slides have been solved. Problem 1 (CLP): see [68] on this page. Problem 6 (nonexistence of a right inverse of the compact congruence semilattice functor on finite Boolean semilattices and zero-preserving join-embeddings): see [62] (with Jiří Tůma) on this page. Problem 8 (whether every distributive join-semilattice with zero is a retract of an ultraboolean one): see [59] on this page.

download the pdf presentation (created under beamer.cls) of my September 2007 Tale (Slovakia) talk A counterexample to the Congruence Lattice Problem.

Most of the material presented there comes from the paper [68] on this page.

download the pdf presentation (created under beamer.cls) of my May 2008 talk at the ROGICS08 conference in Mahdia (Tunisia) Large lower finite lattices with breadth three.

Most of the material presented there comes from the paper [72] on this page.

download the pdf presentation (created under beamer.cls) of my July 2008 talk in Darmstadt Modular lattices and von Neumann regular rings.

download the pdf presentation (created under beamer.cls) of my September 2008 talk at the SSAOS08 conference in Třešť (Czech Republic) Von Neumann coordinatization, Banaschewski functions, and larders.

download the pdf presentation (created under beamer.cls) of my February 2009 colloquium talk at the IRMA (Strasbourg) Treillis distributifs de congruences d'algèbres générales.

download the pdf presentation (created under beamer.cls) of my March 2009 talk at AAA77 (Potsdam) Representations of graph monoids by regular rings.

download the pdf presentation (created under beamer.cls) of my August 2009 talk at NSAC09 (Novi Sad, Serbia) From lifting objects to lifting diagrams: recent progress on larders and CLL.

download the pdf presentation (created under beamer.cls) of my February 2010 colloquium talk at Vanderbilt University (Nashville, TN, USA) Approximating the finite by the infinite: Larders and CLL.

download the pdf presentation (created under beamer.cls) of my June 2010 talk at BLAST 2010 (Boulder, CO, USA) Large free sets versus k-ladders: combinatorial issues raised by ``From lifting objects to lifting diagrams''.

download the pdf presentation (created under beamer.cls) of my August 2010 talk at ``New Trends in Noncommutative Algebra" 2010 (Seattle, WA, USA) Nonstable K-theory of regular rings and Banaschewski functions.

download the pdf presentation (created under beamer.cls) of the talk given by Luigi Santocanale's in July 2011 at ``Topology, Algebra, and Categories in Logic 2011 (Marseille, France) Sublattices of associahedra and permutohedra, based on our join paper [80] from my publications page.

download the pdf presentation (created under beamer.cls) of my September 2012 talk at ``50th Summer School on Algebra and Ordered Sets" 2012 (Nový Smokovec, Slovakia) The extended permutohedron on a transitive relation.

download the pdf presentation (created under beamer.cls) of my June 2013 talk at NSAC 2013 (Novi Sad, Serbia) Lattices of regular closed sets in closure spaces: semidistributivity and Dedekind-MacNeille completions.

télécharger la présentation pdf (créée sous beamer.cls) de mon exposé Identités cachées, le 17 mars 2014, au lycée Lebrun (Coutances, FR). Télécharger ici mes notes pour la série d'ateliers correspondante du 18 mars 2014.

download the pdf presentation (created under beamer.cls) of the September 2014 talk at SSAOS 2014 (Stará Lesná, Slovakia), by Luigi Santocanale and myself, The equational theory of permutohedra.

download the pdf presentation (created under beamer.cls) of my June 2016 talk at Workshop on New Directions in Inverse Semigroups (Ottawa, Canada), Type monoids of Boolean inverse semigroups.

download the pdf presentation (created under beamer.cls) of my March 2017 talk at Journées d'algèbre 2017 (Caen), Gcd-monoids arising from categories and posets.

download the pdf presentation (created under beamer.cls) of my May 2017 talk at Conference on Order in Algebra and Logic 2017 (Baton Rouge), Spectral spaces of countable Abelian l-groups.

download the pdf presentation (created under beamer.cls) of my September 2017 talks at 55th Summer School on Algebra and Ordered Sets (Nový Smokovec, Slovakia), Spectral spaces of countable Abelian l-groups.

download the pdf presentation (created under beamer.cls) of my December~12, 2017 talk at the 83th Annual Conference of the Indian Mathematical Society: an International Meet (Tirupati, India), Ranges of functors in algebra.

download the pdf presentation (created under beamer.cls) of my December~19, 2017 talk at the International Conference on Algebra and Analysis (Pune, India), Spectrum problems for structures arising from lattices and rings (updated version, summer 2018).

download the pdf presentation (created under beamer.cls) of my December~22, 2017 talk at Abasaheb Garware College (Pune, India), Hidden identities.

download the pdf presentation (created under beamer.cls) of my August 2018 talk at SYSMICS (Les Diablerets, Switzerland), Spectrum problems for structures arising from lattices and rings.

download the pdf presentation (created under beamer.cls) of my December 2018 talk at LIX (Ecole Polytechnique, Palaiseau), La théorie équationnelle de l'ordre faible de Bruhat.

download the pdf presentation (created under beamer.cls) of my May 2019 talk at OAL-RAG 2019 (Baton Rouge, USA), Spectra of Abelian l-groups are anti-elementary.

download the pdf presentation (created under beamer.cls) of my September 2019 talk at II Barcelona weekend on operator algebras and noncommutative algebra (Barcelona, Spain), Anti-elementarity for ranges of functors.

download the pdf presentation (created under beamer.cls) of my August 2020 talk at IECMSA-2020 (initially intended for Skopje, Macedonia, changed to a virtual meeting due to Covid-19), Spectrum problems for structures arising from lattices and rings (updated version of my talk at les Diablerets above).

download the pdf presentation (created under beamer.cls) of my November 2020 talk at IITK logic webinar, Purity and freshness (in categorical model theory).

download the pdf presentation (created under beamer.cls) of my December 2020 talk at S\'eminaire d'alg\`ebre et de g\'eom\'etrie, Right-orderability versus left-orderability for monoids.

download the pdf presentation (created under beamer.cls) of my March 2021 Colloquium talk at NMSU Math Department , Intractability for images of certain functors.

download the pdf presentation (created under beamer.cls) of my March 2022 talk at the Ordered Algebras and Logic conference (Les Diablerets, Switzerland), Projective classes as images of accessible functors .

download the pdf presentation (created under beamer.cls) of my May 2022 talk at the Duality and more workshop in Nice, Projective classes as images of accessible functors .

download the pdf presentation (created under beamer.cls) of my May 2022 (online) talk at the International Conference on Algebra and Discrete Mathematics (ICADM 2022), Savitribai Phule Pune University, Pune-411007, India, Projective classes as images of accessible functors .

download the pdf presentation (created under beamer.cls) of my June 2022 talk at the Topology, Algebra, and Categories in Logic 2022 (TACL 2022) conference in Coimbra, Spectra and subspectra arising from l-groups and commutative rings .

télécharger la présentation pdf (créée sous beamer.cls) de mon exposé Une petite balade dans le premier ordre, le 8 mars 2023, à l'atelier Canopé (Caen).

download the pdf presentation (created under beamer.cls) of my June 2023 talk at the Séminaire Algèbre et Géométrie (University of Caen) Projective classes as images of accessible functors .