PD Dr. habil. Rupert M. Hölzl

Institute for Theoretical Computer Science, Mathematics, and Operations Research Bundeswehr University Munich Werner-Heisenberg-Weg 39 85579 Neubiberg, Germany r@hoelzl.fr Email ruperthoelzl Skype +49 89 6004 2418 Phone

Publications, Talks, Teaching

Journals

R. Hölzl, C. P. Porter Degrees of randomized computability
		Bulletin of Symbolic Logic, March 2022
R. Hölzl, W. Merkle, J. S. Miller, F. Stephan, Yu L. Chaitin’s Ω as a Continuous Function
		Journal of Symbolic Logic, March 2020
R. Hölzl, C. P. Porter Rank and randomness
		Journal of Symbolic Logic, December 2019
R. Hölzl, S. Jain, F. Stephan Learning Pattern Languages Over Groups
		Journal version: Theoretical Computer Science, September 2018
		Conference version: Algorithmic Learning Theory, October 2016
L. Bienvenu, R. Hölzl, C. P. Porter, P. Shafer Randomness and semi-measures
		Notre Dame Journal of Formal Logic, June 2017
R. Hölzl, C. P. Porter Randomness for computable measures and initial segment complexity
		Annals of Pure and Applied Logic, April 2017
R. Hölzl, S. Jain, F. Stephan Inductive Inference and Reverse Mathematics
		Journal version: Annals of Pure and Applied Logic, December 2016
		Conference version: Symposium on Theoretical Aspects of Computer Science, March 2015
R. Hölzl, F. Stephan, Yu L. On Martin's Pointed Tree Theorem
		Computability, May 2016
R. Hölzl, P. Shafer Universality, optimality, and randomness deficiency
		Annals of Pure and Applied Logic, October 2015
V. Brattka, G. Gherardi, R. Hölzl Probabilistic Computability and Choice
		Information and Computation, June 2015
L. Bienvenu, R. Hölzl, J. S. Miller, A. Nies Denjoy, Demuth and Density
		Journal version: Journal of Mathematical Logic, June 2014
		Conference version: Symposium on Theoretical Aspects of Computer Science, March 2012
R. Hölzl, T. Kräling, F. Stephan, Wu G. Initial Segment Complexities of Randomness Notions
		Journal version: Information and Computation, February 2014
		Conference version: Theoretical Computer Science, September 2010
L. Bienvenu, A. D. Day, R. Hölzl From Bi-immunity to Absolute Undecidability
		Journal of Symbolic Logic, December 2013
G. Barmpalias, R. Hölzl, A. E. M. Lewis, W. Merkle Analogues of Chaitin's Omega in the computably enumerable sets
		Information Processing Letters, January 2013
R. Hölzl, T. Kräling, W. Merkle Time-bounded Kolmogorov complexity and Solovay functions
		Journal version: Theory of Computing Systems, January 2013
		Conference version: Mathematical Foundations of Computer Science, August 2009
L. Bienvenu, R. Hölzl, T. Kräling, W. Merkle Separations of non-monotonic randomness notions
		Journal version: Journal of Logic and Computation, September 2010
		Conference version: Computability and Complexity in Analysis, August 2009

Book chapters

R. Hölzl, D. Raghavan, F. Stephan, Zhang J. Weakly Represented Families in Reverse Mathematics
		Computability and Complexity, Lecture Notes in Computer Science, January 2017
V. Brattka, G. Gherardi, R. Hölzl, A. Pauly The Vitali Covering Theorem in the Weihrauch Lattice
		Computability and Complexity, Lecture Notes in Computer Science, January 2017

Peer‑reviewed conferences

R. Hölzl, S. Jain, P. Schlicht, K. Seidel, F. Stephan Automatic Learning from Repetitive Texts
		Algorithmic Learning Theory, October 2017
V. Brattka, R. Hölzl, R. Kuyper Monte Carlo Computability
		Symposium on Theoretical Aspects of Computer Science, March 2017
V. Brattka, G. Gherardi, R. Hölzl Las Vegas Computability and Algorithmic Randomness
		Symposium on Theoretical Aspects of Computer Science, March 2015
R. Hölzl, W. Merkle Traceable sets
		Theoretical Computer Science, September 2010
R. Hölzl, W. Merkle Generation complexity versus distinction complexity
		Theory and Applications of Models of Computation, April 2008

Submitted

P. Hertling, R. Hölzl, P. Janicki Regainingly approximable numbers and sets
		May 2023
R. Hölzl, P. Janicki Benign approximations and non-speedability
		March 2023
J. Franklin, R. Hölzl, A. Melnikov, Ng K., D. Turetsky Computable classifications of continuous, transducer, and regular functions
		October 2020

Selected talks

Randomness for computable measures, and complexity
		Invited seminar talk at the at the National University of Singapore, December 2019 Special session talk at the Logic Colloquium, Leeds, August 2016
		Contributed talk at Computability, Complexity & Randomness, Honolulu, January 2016
Rank and randomness
		Habilitation defense at the Bundeswehr University Munich, January 2019 Invited talk at Aspects of Computation, Singapore, August 2017 Invited talk at Computability and Reducibility, Hiddensee, August 2017
Degrees of randomized computability
		Invited seminar talk at the National University of Singapore, September 2018 Invited talk at Computability and Complexity in Analysis, Kochel, August 2018
Monte Carlo Computability
		Invited talk at the Dagstuhl Workshop on Computability Theory, February 2017
Vitali Covering in the Weihrauch degrees
		Invited seminar talk at the University of Florida, October 2015
		Invited talk at Computability, Complexity & Randomness, Heidelberg, June 2015
Universality, optimality, and randomness deficiency
		Invited seminar talk at the Bundeswehr University Munich, March 2015 Invited seminar talk at the University of Heidelberg, December 2014
The reverse mathematics of inductive inference
		Invited seminar talk at the Universiteit Gent, August 2014 Invited seminar talk at the Bundeswehr University Munich, August 2014
Randomness in the Weihrauch degrees
		Special session talk at the Logic Colloquium, Vienna, July 2014
Randomness for semi-measures
		Invited talk at Analysis, Randomness and Applications, Nancy, June 2013
Absolutely undecidable sets
		Invited seminar talk at the University of Greifswald, November 2016 Invited seminar talk at the University of Darmstadt, October 2013 Invited seminar talk at the Loria, Nancy, December 2012
Denjoy, Demuth and Density
		Seminar talk at the Bundeswehr University Munich, March 2013
		Special session talk at the 12th Asian Logic Conference, Wellington, December 2011

Selected teaching material

Ausgewählte Kapitel der Komplexitätstheorie
		Lecture on selected topics from advanced complexity theory in German, March 2022
Quantencomputer
		Short lecture on quantum computing in German, December 2022

Other

Article reviews
		MathSciNet Mathematical Reviews
		Zentralblatt MATH
Kolmogorov complexity
		Doctoral dissertation, December 2010
Maß in Polynomialzeit
		Diploma thesis in German, October 2006

CV

2015	+			Wissenschaftlicher Mitarbeiter (E14) at the Institute for Theoretical Computer Science, Mathematics and Operations Research of the Bundeswehr University Munich.
2019				Habilitation in theoretical computer science and mathematical logic at the Bundeswehr University Munich.
2017	-	8		Visiting full professor (Vertretungsprofessur W3) at the University of Passau during the winter semester.
2014	-	5		Research Fellow at the Department of Mathematics of the National University of Singapore.
2013				Postdoctoral researcher at the Institute for Theoretical Computer Science, Mathematics and Operations Research of the Bundeswehr University Munich, funded by a Feodor Lynen Return Fellowship by the Alexander von Humboldt Foundation.
2011	-	2		Postdoctoral researcher at the Laboratoire d'Informatique Algorithmique: Fondements et Applications, funded by a Feodor Lynen Research Fellowship by the Alexander von Humboldt Foundation.
2010				Dissertation in mathematics at the University of Heidelberg.
2007	-	10		Doctoral student with Priv.-Doz. Dr. Wolfgang Merkle at the University of Heidelberg, funded by the German Research Foundation.
2007				Diplom in mathematics at the University of Heidelberg.
2001	-	7		Scholarship by the Studienstiftung des deutschen Volkes.
2004	-	5		Study abroad at the École Normale Supérieure in Paris.
2003				Vordiplom in physics at the University of Heidelberg.
1983				Born in Munich.

Member of the programme committees of Computability and Complexity in Analysis 2018 and of Computability, Complexity and Randomness 2015 and 2017.

Fluent in German, English, French.

Hobbies include photography, mountaineering, and scuba diving.

Photography