Matteo Spadetto

Postdoc at the LS2N of the University of Nantes, France, supervised by Guilhem Jaber.

Previusly, I was a postdoc at the Dipartimento di Scienze Matematiche, Informatiche e Fisiche of the University of Udine, Italy, supervised by Marino Miculan.

My PhD thesis, completed at the School of Mathematics of the University of Leeds (UK), is in mathematical logic, dependent type theory, and categorical semantics. It was supervised by Nicola Gambino, Federico Olimpieri, and Michael Rathjen.

Email address. Contact me at matteo.nomen.42@gmail.com where nomen is spadetto.

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My main research interests lies in the area of homotopy type theory and semantics of dependent type theory. I am particularly interested in axiomatic (also know in the literature as weak, objective, propositional) type theory, where computation rules are all explicit. I study such formal systems via categorical semantics methods, in order to deduce properties like property-likeness, completeness, coherence, relative consistency, and conservativity.

I have also been working on the notions of hyperdoctrines and Grothendieck fibrations to approach the study of fragments of first-order logic, focusing on quantifier completions, the dialectica construction, and canonicity properties.

Lately, I have also been working on topics connected to temporal logics and circular reasoning.

Click here for a curriculum vitae and here for a research statement.


Ongoing research.

Publications and preprints
  • [Preprint] Higher dimensional semantics of axiomatic dependent type theory. [2507.07208]. January 2025.
  • [Preprint] A biequivalence of path categories and axiomatic Martin Löf type theories. [2503.15431]. October 2024. Together with Daniël Otten.
  • [Preprint] Towards propositional dependent sums in intensional and propositional dependent type theory. January 2024.
  • [Preprint] The Gödel fibration (extended version). [2104.14021v1]. April 2021. Together with Davide Trotta and Valeria de Paiva.
  • [Preprint] Quantifier completions, choice principles and applications. [2010.09111v3]. Submitted. October 2020. Together with Davide Trotta.
  • [Journal paper] Relating homotopy equivalences to conservativity in dependendent type theories with propositional computation. [2303.05623v2]. Accepted for Logical Methods in Computer Science. June 2025.
  • [Journal paper] Dialectica principles via Gödel doctrines. [2205.07093v1]. Theoretical Computer Science. February 2023. Together with Davide Trotta and Valeria de Paiva.
  • [Journal paper] Dialectica logical principles: not only rules. Journal of Logic and Computation. December 2022. Together with Davide Trotta and Valeria de Paiva.
  • [PhD thesis] On the syntax and the semantics of propositional dependent type theories. Click here. July 2024.
Selected talks in conferences, workshops, seminars
Visiting activities
  • ILLC, Amsterdam, the Netherlands. Host Benno van den Berg. April-May 2023.
  • University of Padua, Italy. Host Maria Emilia Maietti. December 2022.
Some links and stuff


cuckoo's A portrait of me and my collaborator working together.