Johannes Marti

I am a postdoc with Dan Olteanu in the Data Systems and Theory group at the University of Zurich.

Before, I did postdocs with Michael Benedikt at the Department of Computer Science in Oxford, with Yde Venema at the ILLC in Amsterdam, 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 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 modal fixpoint logics:

• Size Measures and Alphabetic Equivalence in the mu-Calculus (preprint, doi),
  with C. Kupke and Y. Venema, at LICS 2022.
  
• Succinct Graph Representations of mu-Calculus Formulas (preprint, doi),
  with C. Kupke and Y. Venema, at CSL 2022.
  
• A Focus System for the Alternation-Free mu-Calculus (preprint, doi),
  with Y. Venema, at 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:

• Frame Definability in Conditional Logic (draft),
  with D. Fornasiere and G. Varricchione.
• 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 (arXiv, doi),
  with P. Galeazzi, in Games and Economic Behavior, 2023.

Talks

all talks

Contact

E-mail: marti@ifi.uzh.ch