Johannes Marti

I am a postdoc at the ILLC in Amsterdam working with Yde Venema on proof systems for modal fixpoint logics.

Before, I did postdocs with Carsten Lutz in the Theory of Artificial Intelligence group at the University of Bremen and with Clemens Kupke in the MSP group at the University of Strathclyde in Glasgow.

I completed my dissertation under the supervision Martin Stokhof and Frank Veltman also at the ILLC. My PhD thesis is on representation theorems for possible world models of belief and meaning with respect to linguistic behavior.

Papers

On fixpoint logic:

• A Focus System for the Alternation-Free mu-Calculus (preprint),
  with Y. Venema, accepted to TABLEAUX 2021.
  
• Focus-Style Proof Systems and Interpolation for the Alternation-Free mu-Calculus (arXiv),
  with Y. Venema.
  
• On the Size of Disjunctive Formulas in the mu-Calculus (arXiv),
  with C. Kupke and Y. Venema, at GandALF 2021.
  
• Size Matters in the Modal mu-Calculus (arXiv),
  with C. Kupke and Y. Venema.
  
• Completeness for Game Logic (preprint),
  with S. Enqvist, H. H. Hansen, C. Kupke and Y. Venema, at LICS 2019.
  
• Parity Games and Automata for Game Logic (preprint, doi),
  with H. H. Hansen, C. Kupke and Y. Venema, at DALI 2017.
  This extended version includes all the proofs.

On coalgebraic modal logic, partially based on my MSc thesis:

• Uniform Interpolation for Coalgebraic Fixpoint Logic (preprint, doi),
  with F. Seifan and Y. Venema, at CALCO 2015.
• Lax Extensions of Coalgebra Functors and Their Logic (preprint, doi),
  with Y. Venema, in the Journal of Computer and System Sciences, 2015.
  This paper is an extended version of the earlier:
• Lax Extensions of Coalgebra Functors (preprint, doi),
  with Y. Venema, at CMCS 2012.

On description logic:

• A Journey into Ontology Approximation: From Non-Horn to Horn (arXiv, doi),
  with A. Haga, C. Lutz and F. Wolter, at IJCAI 2020.
  
• Query Expressibility and Verification in Ontology-Based Data Access (arXiv, publisher, erratum),
  with C. Lutz and L. Sabellek, at KR 2018.
  

On nonmonotonic and conditional logic:

• Conditional Logic is Complete for Convexity in the Plane (arXiv, doi)
  in The Review of Symbolic Logic, 2021.
• A Discrete Duality Between Nonmonotonic Consequence Relations and Convex Geometries (preprint, doi),
  with R. Pinosio, in Order, 2020.
• A Game Semantics for System P (preprint, doi),
  with R. Pinosio, in Studia Logica, 2016.
  This extended version of the paper contains additional proofs.
• Similarity Orders from Causal Equations (preprint, doi),
  with R. Pinosio, at JELIA 2014.
• Topological Semantics for Conditionals (preprint),
  with R. Pinosio, at LOGICA 2013.

On epistemic game theory:

• Choice Structures in Games (draft),
  with P. Galeazzi.

Talks

all talks

Contact

E-mail: johannes.marti@gmail.com

Phone: +31 20 525 7173

Mailing Address:
FNWI, ILLC
Universiteit van Amsterdam
P.O. Box 94242
1090 GE Amsterdam

Visiting Address:
Room F2.16
Science Park 107
1098 XG Amsterdam