Welcome to my academic homepage! I am a postdocoral researcher in the Faculty of Mathematics, Informatics and Mechanics at the University of Warsaw.

Previously I have obtained my PhD degree in Computer Science at
the Radboud Universiteit Nijmegen, with a thesis titled *Coalgebraic
Characterizations of Automata-Theoretic Classes*, under supervision of Jan Rutten and Marcello Bonsangue, and a MSc degree
in Logic at the ILLC at the University of Amsterdam, with a thesis on transfinite computation, under supervision of Benedikt Löwe.

If you find any mistakes, errors, or unjustly omitted references in any of my papers, please mail me so I can add them to the list of errata!

Coalgebra, bialgebra, formal languages and automata theory, formal power series, streams, automatic sequences, category theory, functional programming.

- Joost Winter: Product rules and distributive laws. Accepted for
*CMCS 2016*. PDF (Full version) - Joost Winter: A Yang-Baxter-like condition for distributive laws over endofunctors and co-pointed endofunctors.
*Presented at CALCO Early Ideas 2015.*PDF - Joost Winter: A completeness result for finite λ-bisimulations. In
*FoSSaCS 2015*, pp. 117-132. PDF - Joost Winter, Marcello M. Bonsangue, Jan Rutten: Context-free Coalgebras. In
*Journal of Computer and System Sciences*, 89 (2015), pp. 911-939. PDF Errata - Helle Hvid Hansen, Clemens Kupke, Jan Rutten, Joost Winter: A Final Coalgebra for k-Regular Sequences. In Franck van Breugel et al (eds.),
*Horizons of the Mind: A Tribute to Prakash Panangaden*(2014), pp. 124-145. PDF - Joost Winter, Marcello M. Bonsangue, Jan Rutten: Coalgebraic Characterizations of Context-free Languages. In
*Logical Methods in Computer Science*, Vol. 9 (3:14) (2013). PDF - Jurriaan Rot, Joost Winter: On Language Equations and Grammar Coalgebras for Context-free Languages.
*Presented at CALCO Early Ideas 2013.*PDF - Joost Winter: QStream: A Suite of Streams. In
*CALCO 2013*, pp. 353-358. PDF - Frank de
Boer, Michiel Helvensteijn,
Joost Winter: A Modal Logic for Abstract Delta Modeling. In
*SPLC (2) 2012*: pp. 45-52. PDF - Baltasar Trancón y Widemann, Joost Winter: Lindenmayer Systems, Coalgebraically. Short contribution, presented at CMCS 2012. PDF
- Marcello M. Bonsangue,
Jan Rutten, Joost Winter:
Defining Context-Free Power Series Coalgebraically. In
*CMCS 2012*: pp. 20-39. PDF Errata - Joost Winter, Marcello
M. Bonsangue, Jan Rutten:
Context-Free Languages, Coalgebraically. In
*CALCO 2011*: pp. 359-376. PDF - Joost Winter: Is P = PSPACE for Infinite Time Turing Machines?
In
*ILC 2007*: pp. 126-137. PDF - Joost Winter: Space Complexity in Infinite Time Turing Machines. MSc Thesis. ILLC MOL-2007-14. PDF

- Arden's Rule and the Kleene-Schützenberger Theorem: Presentation given at the ACG, on December 3, 2013. PDF
- A Final Coalgebra for the k-regular and k-automatic Sequences: Presentation given at Highlights of Logic, Games and Automata, on September 21, 2013. PDF
- QStream: A Suite of Streams: Presentation given at CALCO Tools, on September 3, 2013. PDF
- On Language Equations and Grammar Coalgebras for Context-free Languages: Presentation given at CALCO Early Ideas, on September 2, 2013. PDF
- Coinductive Stream Calculus in Haskell: Presentation given at the ACG, on June 5, 2013. PDF
- Representing algebraic streams using behavioural differential equations: Presentation given at the Representing Streams workshop in Leiden, on December 12, 2012. PDF
- Behavioural differential equations: an introduction: Presentation given at ICT Open, on October 23, 2012. PDF
- Automatic Sequences as Context-Free Systems: Presentation given at the Dagstuhl seminar on Coalgebraic Logics, on 15 October 2012. PDF
- Generalized Context-Freeness: Presentation given at the COIN symposium, on January 23, 2012. PDF
- A Coalgebraic View on Context-Free Languages and Streams: Presentation given at the CoRE workshop, on November 8, 2011. PDF
- A Coalgebraic View on Context-Free Languages: Presentation given at CALCO '11, on August 31, 2011. PDF
- A Coalgebraic View on Context-Free Languages and Streams: Presentation given at the Streams Seminar, on May 10, 2011. PDF
- A Coalgebraic View on Context-Free Languages: Presentation given at IPA Lentedagen, on April 7, 2011. PDF
- Coalgebra, Coinduction, and Languages: Presentation given at the ACG, on March 2, 2011. PDF

- QStream, a simple tool for coinductive stream specifications, written in Haskell.

For comments, e-mail to <*jwinter@mimuw.edu.pl*>.

This page is best viewed with the beautiful, free and open, Gentium Basic font installed.