Mathematics of weaving, Humboldt University, Berlin (June 5, 2020)



University of Trento, join talk department of philosophy and mathematics (May 25, 2020)



Dimensions of Epistemic Justification, University of Cologne (March 26-27, 2020)

Commentator at Large


Understanding Mathematical Explanation: Uniting Philosophical and Educational Perspectives, Rutgers University (April 6, 2020)



The ‘End’ of Philosophy of Mathematics?, Princeton University (April 3, 2020)

Mathematical Justification Ain’t What it Seems




Fifth International Conference of the Association for the Philosophy of Mathematical Practice, ETH, Zurich (18-21 January 2020)

“A Fallibilist Account of Mathematical Justification”


Carnegie Mellon University, department colloquium (8 November 2019)

“Rigorous Diagrammatic Proofs”


Rutgers University, Talk at the Proof Comprehension Research Group (1 November 2019)

“What is a Mathematical Diagram?


16th Congress of Logic, Methodology and Philosophy of Science and Technology, Prague (5-10 August 2019)

“The Epistemic Basing Relation in Mathematics”


 Masterclass in the Philosophy of Mathematical Practice, Vrije Universiteit Brussel (19-21 June 2019)

“Mathematical Justification in Practice”


 Explanatory and Heuristic Power of Mathematics (invited paper), Roma La Sapienza (13-14 June 2019)

“Grasping How a Proof Supports its Conclusion”


Intersem Talk, organized by Mic Detlefsen, Paris 7, Sphere, (6 June 2019)

“Rigorous Diagrammatic Proofs”


Big Proofs Workshop, International Centre for Mathematical Sciences—ICMS (invited paper), Edinburgh (26-31 May 2019)

            “Diagrammatic Notations in Mathematical Proofs”


Macalester College, Colloquium Talk (25 April 2019)

“Mathematical Justification in Practice”


Pacific APA, Vancouver (17-20 April 2019) 

“Proof, Simil-Proofs, and Mathematical Justification”


Mathematics in Action – Workshop (invited paper), Henri Poincaré Archives, Nancy (13-14 December 2018)

“Mathematical Justification in Practice”


XXIV World Congress of Philosophy, Beijing (13-20 August 2018)

“Fruitful Over-determination for Mathematical Notations”


Proofs and Representations Workshop (invited paper), Munich Center for Mathematical Philosophy, Munich (6-8 July 2018)

“Heterogenous Notations for Mathematical Proofs”


Diagrams 2018 Conference, Edinburgh (18-22 June 2018)

“Fruitful Over-determination in Knot Diagrams”


University of British Columbia, Okanagan campus, colloquium talk (23 February 2018)

“Diagrams in Mathematical Practice”


Eastern APA, Realist/Anti-Realist Society (invited paper), Savannah (3-7 January 2018)

“Proofs and Diagrams in Mathematics”


Fourth International Conference of the Association for the Philosophy of Mathematical Practice, Salvador, Brazil (23-27 October 2017)

“Varieties of Mathematical Diagrams”


Visual Reasoning and Intuition in Mathematics. From Kant’s Euclidicity to Digitalization, conference (invited paper) Free University of Berlin (29 June-1 July 2017)

“Knots and Embeddings: New Tools for Incongruent Counterparts”


Logic in Question 7 conference (invited paper), Paris Sorbonne (13-14 June 2017)

“Thinking with Diagrams: The Case of Mathematics”


PhilMath seminar series (invited paper), IHPST, Paris (12 June 2017)

“Varieties of Mathematical Diagrams”


PROOFS workshop (invited paper), IHPST, Paris, (1-2 June 2017)

“The Notion of Proof in the Practice of Mathematics”


Mathématiques en action seminar series, Archives Henri Poincaré, Nancy (24 April 2017)

“What is a Mathematical Diagram?”


Tools of Reason workshop, Stanford University (10-11 February 2017)

“Thinking with Diagrams: The Case of Mathematics”


Midwest PhilMath Workshop 17, Notre Dame University (12-13 November 2016)

“Thinking with Diagrams: The Case of Mathematics”


City College New York, colloquium (22 September 2016)

“Aspects of Diagrammatic Reasoning in Mathematics”


Vrije Universiteit Brussel, philosophy department seminar (08 July 2016)

“Aspects of Diagrammatic Reasoning in Category Theory” (with I. Goyvaerts)


University of Udine, mathematics and computer science seminar (29 June 2016)

“Pensare con i Diagrammi: Il caso dei Nodi”


Five Years MCMP: Quo Vadis, Mathematical Philosophy? conference (invited paper), Munich Center for Mathematical Philosophy (2-4 June 2016)

“Varieties of Visualizations in Mathematics”


43rd philosophy of science conference in Dubrovnik (invited paper), Croatia (11-15 April 2016)

“Diagrams in Algebra”


Third International Conference of the Association for the Philosophy of Mathematical Practice (keynote), Institut Henri Poincaré, Paris (2-4 November 2015)

“‘Chasing’ The Diagram – The Use of Visualizations in Algebraic Reasoning”


Proofs and Pictures conference, University of South Carolina, Columbia (20 March 2015)

“‘Diagram Chase’ Techniques–The Use of Space in Algebraic Reasoning”


What is? Seminar, Berlin Mathematical School (8 February 2013)

“What is a Rational Tangle?”


Filosofia della matematica: dalla logica alla pratica conference, Scuola Normale Superiore, Pisa, Italy (24-36 September 2012)

“La dinamica dei diagrammi in teoria dei nodi” (with V. Giardino)


Società Italiana di Filosofia Analitica (SIFA) conference, Alghero, Italy (13-15 September 2012)

“Roles and Forms of Diagrams in Knot Theory” (with V. Giardino)


Mathematical Cultures conference, London (10-13 September 2012) “Low-dimensional topology as visual mathematics” (with V. Giardino), Free University of Berlin, Sybille Krämer’s colloquium (19 June 2012)

“Die epistemische Rollen von Diagrammen in der Topologie”


Société de philosophie analytique (SOPHA) conference, École Normale Supérieure, Paris (5 May 2012)

“Diagrammes et Illustrations en Topologie: Le Cas des Nœuds” 


Work in Progress Seminar, Munich Center of Mathematical Philosophy, Munich (19 January 2012)

“Knot Moves: A Case Study on Diagram Dynamics”


University of Sevilla, philosophy seminar (15 November 2011)

“Use and Epistemic Roles of Diagrams in Knot Theory”


What is? Seminar, Berlin Mathematical School (4 December 2009)

“What is a Seifert Surface?”