# Talks

**Converse Extensionality and Apartness**, STiHAC Seminar, Hamburg-Amsterdam-Cambridge, 28 January 2021.
**Converse Extensionality and Apartness**, Categories and Types Seminar (CATS), ILLC, University of Amsterdam, 10 December 2020 (seminar).
**Logics of Intuitionistic Kripke-Platek Set Theory**, DMV Annual Meeting 2020, TU Chemnitz, 16 September 2020.
**Apartness in Constructive Set Theory**, Forschungsseminar Mathematische Logik, University of Hamburg, 15 April 2020 and 22 April 2020.
**De Jongh’s Theorem for Intuitionistic Zermelo-Fraenkel Set Theory**, 28th EACSL Annual Conference on Computer Science Logic (CSL 2020), Barcelona, Spain, 13-16 January 2020 (conference).
**De Jongh’s Theorem for Intuitionistic Zermelo-Fraenkel Set Theory**, DMV-Jahrestagung 2019, Sektion: Logik und Theoretische Informatik, Department of Mathematics (MATH), Karlsruhe Institute of Technology (KIT), 25 September 2019 (conference).
**E-models of IZF and intuitionistic multiverses**, Joel David Hamkins in Amsterdam 2019, ILLC, University of Amsterdam, 11 May 2019 (workshop).
**The de Jongh Property for bounded constructive Zermelo-Fraenkel set theory**, TULIPS – The Utrecht Logic in Progress Series, Utrecht University, 5 March 2019 (seminar).
**Constructing illoyal algebra-valued models of set theory**, SYSMICS 2019, Amsterdam, 21-25 January 2019 (conference).
**Logical aspects of algebra-valued models of set theory**, Algebra|Coalgebra Seminar, ILLC, University of Amsterdam, 19 December 2018 (seminar/abstract).
**The de Jongh Property for a Subtheory of CZF**, Oberseminar mathematische Logik, University of Bonn, 6 November 2018 (seminar/abstract).
**The Propositional Logic of Models of Set Theory**, Colloquium Logicum 2018, 15 September 2018 (conference).
**Heyting structures: Loyalty, faithfulness and an application to the de Jongh property**, Forschungsseminar Mathematische Logik, University of Hamburg, Germany, 7 May 2018 (abstract, seminar).
**Constructing models of constructive or intuitionistic set theory from classical models of set theory**, Categories Seminar, University of Cambridge, United Kingdom, 13 February 2018 (abstract).
**Surreal Numbers**, Set Theory Seminar, University of Cambridge, United Kingdom, 31 January 2017 (abstract).
**One Axiom to Rule Them All**, Cool Logic Seminar, ILLC, University of Amsterdam, The Netherlands, 4 November 2016 (abstract).

## Outreach

**Ist “Unendlich” eine Zahl?**, Online KinderCollege, DHBW Karlsruhe, Germany, 21 October 2020 (flyer).