Moritz Müller FWF

FWF Project P 28699

Complexity theory in feasible mathematics

Since my move to the UPC in January 2018, Jan Pich leads the project and this page is no longer updated.

The project is hosted at Vienna universities Kurt Gödel Research Center for Mathematical Logic (KGRC) directed by Sy David Friedman.

General information about the project can be found here.

Team at the KGRC

Moritz Müller is funded as the project leader.

Jan Pich holds a funded postdoctoral position.

Jan Bydzovsky is working on a master thesis on a topic related to the project.

International collaborators

Albert Atserias at Universitat Polytecnica de Catalunya, Barcelona, Spain.

Yijia Chen at Fudan University, Shanghai, China.

Jan Krajicek at Charles University, Prague, Czech Republic.


Igor Oliveira visits the KRGC from 2017-01-16 to 2017-01-21.

Michal Garlik visits the KRGC from 2017-01-23 to 2017-01-27 and gives a talk.

Yijia Chen visits the KRGC from 2017-08-12 to 2017-08-19 and gives a talk.

Hubie Chen visits the KRGC from 2017-11-30 to 2017-12-10 and gives a talk.


On the relative strength of finitary combinatory principles   By M. Müller, KGRC Forschungsseminar, Vienna, 2017-12-14.

Proof complexity   By M. Müller, Algebra Seminar, TU Vienna, 2017-12-01.

Provability of weak circuit lower bounds   By J. Pich, Prague bounded arithmetic workshop, Prague, 2017-11-2.

Provability of weak circuit lower bounds   By J. Pich, Royal Holloway, University of London, 2017-10-10.

Cobham recursive set functions   By M. Müller, Barcelona Set Theory Seminar, Universitat de Barcelona, 2017-03-16.

Gentzen and Frege systems for QBF   By J. Pich, Computational Logic Day, KGRC, Vienna, 2017-01-13.

Complexity theory in feasible mathematics.   By J. Pich, KGRC Forschungsseminar, Vienna, 2016-10-03.


Feasibly constructive proofs of succinct weak circuit lower bounds.   By J. Pich and M. Müller.
Preprint Electronic Colloqium on Computational Complexity ECCC TR17-144.
Submitted October 2017.

Pseudo proof systems and hard instances of SAT.   By J. Maly and M. Müller.
To appear in Mathematical Logic Quarterly, 2018 .

The parameterized space complexity of model-checking bounded variable first-order logic.   By Y. Chen, M. Elberfeld and M. Müller.
Submitted March 2017.

Reasons for hardness in QBF.   By O. Beyersdorff, L. Hinde and J. Pich.
Proceedings of the 37th IARCS Annual Conference on Foundations of Software Technology and Theoretical Computer Science, to appear, 2017.

Subset-bounded recursion and a circuit model for Cobham recursive set functions.  By A. Beckmann, S. Buss, S.-D. Friedman, M. Müller, N. Thapen.
Submitted December 2016.