Short Bio

I am Joshua Moerman, a computer scientist. Currently, I am a post doctoral researcher at the RWTH Aachen in the MOVES group. I am working on probabilistic programs as a member of the FRAPPANT project.

Formerly, I was a PhD student at the Radboud University in Nijmegen at the Software Science department. Under supervision of Frits Vaandrager, Bas Terwijn, and Alexandra Silva I worked on nominal automata and black box testing in the context of active automata learning.

My research interests include formal verification, PAC learning, coalgebraic methods, functional programming, black-box testing theory, and category theory.



  • Soon I start at the Open University as assistant professor.

  • 14 April 2021 I will give a talk on weighted register automata at OWLS.

  • 1 April 2021 Paper on weighted register automata with Mikołaj Bojańczyk, Bartek Klin and myself is accepted at LICS 2021.

  • 19 February 2021 I am in the PC of ICGI 2021, the international conference on grammatical inference. This will be held on 23-27 August 2021.

  • 12 January 2021 We got gold medals at the RERS Challenge 2021. On this page you can read more.

  • 18 December 2020 Paper on generating functions with Lutz Klinkenberg, Kevin Batz, Benjamin Lucien Kaminski, Joost-Pieter Katoen, Tobias Winkler and myself has received the best paper award.

Please see the list of talks I will gave (or have already given). I also have a research blog.

Recent Papers (full list)

  • arXiv Residuality and Learning for Nondeterministic Register AutomataJoshua Moerman and Matteo Sammartino More ]
  • arXiv (to appear at LICS'21) Orbit-Finite-Dimensional Vector Spaces and Weighted Register AutomataMikołaj Bojańczyk, Bartek Klin and Joshua Moerman More ]
  • Conference Paper LOPSTR 2020 Generating Functions for Probabilistic ProgramsLutz Klinkenberg, Kevin Batz, Benjamin Lucien Kaminski, Joost-Pieter Katoen, Joshua Moerman and Tobias Winkler More ]
  • Conference Paper CONCUR 2020 Residual Nominal AutomataJoshua Moerman and Matteo Sammartino More ]


  • Lehrstuhl für Informatik 2
  • RWTH Aachen University
  • Erweiterungsbau 1, 2nd Floor, Room 4210
  • Ahornstraße 55
  • 52074 Aachen
  • Germany

Telephone number (work)

  • +49 241 80 21203

My CV (pdf)

  • PhD Computer science 2015-2019, more info about my thesis.

  • Master Mathematics (algebra and topology) 2013 - 2015, Radboud University. My master thesis was on Rational Homotopy Theory, supervised by Ieke Moerdijk.

  • Bachelor Computer Science 2009-2013, Radboud University.

  • Bachelor Mathematics 2009-2013, Radboud University.

During my studies, I was employed at the software company Rodo, creating iOS apps. I was also self-employed, see my iOS apps.

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