Stefan Kiefer

Orcid: 0000-0003-4173-6877

Affiliations:
  • University of Oxford, UK


According to our database1, Stefan Kiefer authored at least 98 papers between 2007 and 2024.

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Bibliography

2024
The complexity of computing the period and the exponent of a digraph.
CoRR, 2024

Strategy Complexity of B\"uchi Objectives in Concurrent Stochastic Games.
CoRR, 2024

Minimising the Probabilistic Bisimilarity Distance.
Proceedings of the 35th International Conference on Concurrency Theory, 2024

Memoryless Strategies in Stochastic Reachability Games.
Proceedings of the Taming the Infinities of Concurrency, 2024

2023
Markov chains and unambiguous automata.
J. Comput. Syst. Sci., 2023

2022
The Big-O Problem.
Log. Methods Comput. Sci., 2022

On complementing unambiguous automata and graphs with many cliques and cocliques.
Inf. Process. Lett., 2022

Lower Bounds for Unambiguous Automata via Communication Complexity.
Electron. Colloquium Comput. Complex., 2022

Strategy Complexity of Reachability in Countable Stochastic 2-Player Games.
CoRR, 2022

Strategies for MDP Bisimilarity Equivalence and Inequivalence.
Proceedings of the 33rd International Conference on Concurrency Theory, 2022

On the Sequential Probability Ratio Test in Hidden Markov Models.
Proceedings of the 33rd International Conference on Concurrency Theory, 2022

2021
On Nonnegative Integer Matrices and Short Killing Words.
SIAM J. Discret. Math., 2021

Selective monitoring.
J. Comput. Syst. Sci., 2021

Lower Bounds on Unambiguous Automata Complementation and Separation via Communication Complexity.
CoRR, 2021

Responsibility and verification: Importance value in temporal logics.
Proceedings of the 36th Annual ACM/IEEE Symposium on Logic in Computer Science, 2021

Approximate Bisimulation Minimisation.
Proceedings of the 41st IARCS Annual Conference on Foundations of Software Technology and Theoretical Computer Science, 2021

Image-Binary Automata.
Proceedings of the Descriptional Complexity of Formal Systems, 2021

Linear-Time Model Checking Branching Processes.
Proceedings of the 32nd International Conference on Concurrency Theory, 2021

Transience in Countable MDPs.
Proceedings of the 32nd International Conference on Concurrency Theory, 2021

Enforcing ω-Regular Properties in Markov Chains by Restarting.
Proceedings of the 32nd International Conference on Concurrency Theory, 2021

2020
Trace Refinement in Labelled Markov Decision Processes.
Log. Methods Comput. Sci., 2020

Online Monitoring ω-Regular Properties in Unknown Markov Chains.
CoRR, 2020

Notes on Equivalence and Minimization of Weighted Automata.
CoRR, 2020

On Affine Reachability Problems.
Proceedings of the 45th International Symposium on Mathematical Foundations of Computer Science, 2020

How to Play in Infinite MDPs (Invited Talk).
Proceedings of the 47th International Colloquium on Automata, Languages, and Programming, 2020

On the Size of Finite Rational Matrix Semigroups.
Proceedings of the 47th International Colloquium on Automata, Languages, and Programming, 2020

Comparing Labelled Markov Decision Processes.
Proceedings of the 40th IARCS Annual Conference on Foundations of Software Technology and Theoretical Computer Science, 2020

Equivalence of Hidden Markov Models with Continuous Observations.
Proceedings of the 40th IARCS Annual Conference on Foundations of Software Technology and Theoretical Computer Science, 2020

Strategy Complexity of Parity Objectives in Countable MDPs.
Proceedings of the 31st International Conference on Concurrency Theory, 2020

The Big-O Problem for Labelled Markov Chains and Weighted Automata.
Proceedings of the 31st International Conference on Concurrency Theory, 2020

2019
On Semigroups of Two-Dimensional Upper-Triangular Integer Matrices.
CoRR, 2019

On Finite Monoids over Nonnegative Integer Matrices and Short Killing Words.
Proceedings of the 36th International Symposium on Theoretical Aspects of Computer Science, 2019

Efficient Analysis of Unambiguous Automata Using Matrix Semigroup Techniques.
Proceedings of the 44th International Symposium on Mathematical Foundations of Computer Science, 2019

Büchi Objectives in Countable MDPs.
Proceedings of the 46th International Colloquium on Automata, Languages, and Programming, 2019

On the Complexity of Value Iteration.
Proceedings of the 46th International Colloquium on Automata, Languages, and Programming, 2019

2018
Game Characterization of Probabilistic Bisimilarity, and Applications to Pushdown Automata.
Log. Methods Comput. Sci., 2018

On the Complexity of Iterative Tropical Computation with Applications to Markov Decision Processes.
CoRR, 2018

On Computing the Total Variation Distance of Hidden Markov Models.
Proceedings of the 45th International Colloquium on Automata, Languages, and Programming, 2018

2017
Nonnegative Matrix Factorization Requires Irrationality.
SIAM J. Appl. Algebra Geom., 2017

Minimisation of Multiplicity Tree Automata.
Log. Methods Comput. Sci., 2017

On Rationality of Nonnegative Matrix Factorization.
Proceedings of the Twenty-Eighth Annual ACM-SIAM Symposium on Discrete Algorithms, 2017

Counting Problems for Parikh Images.
Proceedings of the 42nd International Symposium on Mathematical Foundations of Computer Science, 2017

On strong determinacy of countable stochastic games.
Proceedings of the 32nd Annual ACM/IEEE Symposium on Logic in Computer Science, 2017

Parity objectives in countable MDPs.
Proceedings of the 32nd Annual ACM/IEEE Symposium on Logic in Computer Science, 2017

Computing quantiles in Markov chains with multi-dimensional costs.
Proceedings of the 32nd Annual ACM/IEEE Symposium on Logic in Computer Science, 2017

2016
The complexity of the Kth largest subset problem and related problems.
Inf. Process. Lett., 2016

Efficient Quantile Computation in Markov Chains via Counting Problems for Parikh Images.
CoRR, 2016

Distinguishing Hidden Markov Chains.
Proceedings of the 31st Annual ACM/IEEE Symposium on Logic in Computer Science, 2016

On Restricted Nonnegative Matrix Factorization.
Proceedings of the 43rd International Colloquium on Automata, Languages, and Programming, 2016

Proving the Herman-Protocol Conjecture.
Proceedings of the 43rd International Colloquium on Automata, Languages, and Programming, 2016

Markov Chains and Unambiguous Büchi Automata.
Proceedings of the Computer Aided Verification - 28th International Conference, 2016

2015
Runtime analysis of probabilistic programs with unbounded recursion.
J. Comput. Syst. Sci., 2015

Long-Run Average Behaviour of Probabilistic Vector Addition Systems.
Proceedings of the 30th Annual ACM/IEEE Symposium on Logic in Computer Science, 2015

The Odds of Staying on Budget.
Proceedings of the Automata, Languages, and Programming - 42nd International Colloquium, 2015

Tree Buffers.
Proceedings of the Computer Aided Verification - 27th International Conference, 2015

2014
Efficient Analysis of Probabilistic Programs with an Unbounded Counter.
J. ACM, 2014

Language equivalence of probabilistic pushdown automata.
Inf. Comput., 2014

Stability and Complexity of Minimising Probabilistic Automata.
Proceedings of the Automata, Languages, and Programming - 41st International Colloquium, 2014

Analysis of Probabilistic Basic Parallel Processes.
Proceedings of the Foundations of Software Science and Computation Structures, 2014

On the total variation distance of labelled Markov chains.
Proceedings of the Joint Meeting of the Twenty-Third EACSL Annual Conference on Computer Science Logic (CSL) and the Twenty-Ninth Annual ACM/IEEE Symposium on Logic in Computer Science (LICS), 2014

Zero-reachability in probabilistic multi-counter automata.
Proceedings of the Joint Meeting of the Twenty-Third EACSL Annual Conference on Computer Science Logic (CSL) and the Twenty-Ninth Annual ACM/IEEE Symposium on Logic in Computer Science (LICS), 2014

2013
BPA bisimilarity is EXPTIME-hard.
Inf. Process. Lett., 2013

A strongly polynomial algorithm for criticality of branching processes and consistency of stochastic context-free grammars.
Inf. Process. Lett., 2013

Algorithmic probabilistic game semantics - Playing games with automata.
Formal Methods Syst. Des., 2013

Analyzing probabilistic pushdown automata.
Formal Methods Syst. Des., 2013

On the Complexity of Equivalence and Minimisation for Q-weighted Automata
Log. Methods Comput. Sci., 2013

Bisimilarity of Pushdown Automata is Nonelementary.
Proceedings of the 28th Annual ACM/IEEE Symposium on Logic in Computer Science, 2013

2012
Space-efficient scheduling of stochastically generated tasks.
Inf. Comput., 2012

Three tokens in Herman's algorithm.
Formal Aspects Comput., 2012

Bisimilarity of Pushdown Systems is Nonelementary
CoRR, 2012

Stabilization of Branching Queueing Networks.
Proceedings of the 29th International Symposium on Theoretical Aspects of Computer Science, 2012

Model Checking Stochastic Branching Processes.
Proceedings of the Mathematical Foundations of Computer Science 2012, 2012

Bisimilarity of Probabilistic Pushdown Automata.
Proceedings of the IARCS Annual Conference on Foundations of Software Technology and Theoretical Computer Science, 2012

On the Complexity of the Equivalence Problem for Probabilistic Automata.
Proceedings of the Foundations of Software Science and Computational Structures, 2012

APEX: An Analyzer for Open Probabilistic Programs.
Proceedings of the Computer Aided Verification - 24th International Conference, 2012

Proving Termination of Probabilistic Programs Using Patterns.
Proceedings of the Computer Aided Verification - 24th International Conference, 2012

2011
Derivation tree analysis for accelerated fixed-point computation.
Theor. Comput. Sci., 2011

Parikhʼs theorem: A simple and direct automaton construction.
Inf. Process. Lett., 2011

On Probabilistic Parallel Programs with Process Creation and Synchronisation.
Proceedings of the Tools and Algorithms for the Construction and Analysis of Systems, 2011

On Stabilization in Herman's Algorithm.
Proceedings of the Automata, Languages and Programming - 38th International Colloquium, 2011

Language Equivalence for Probabilistic Automata.
Proceedings of the Computer Aided Verification - 23rd International Conference, 2011

2010
Solving Systems of Positive Polynomial Equations (Lösung positiver polynomieller Gleichungssysteme)
PhD thesis, 2010

Computing the Least Fixed Point of Positive Polynomial Systems.
SIAM J. Comput., 2010

Newtonian program analysis.
J. ACM, 2010

Parikh's Theorem: A simple and direct construction
CoRR, 2010

Computing Least Fixed Points of Probabilistic Systems of Polynomials.
Proceedings of the 27th International Symposium on Theoretical Aspects of Computer Science, 2010

2009
On least fixed points of systems of positive polynomials.
ACM Commun. Comput. Algebra, 2009

On the Memory Consumption of Probabilistic Pushdown Automata.
Proceedings of the IARCS Annual Conference on Foundations of Software Technology and Theoretical Computer Science, 2009

Interprocedural Dataflow Analysis over Weight Domains with Infinite Descending Chains.
Proceedings of the Foundations of Software Science and Computational Structures, 2009

Solving Fixed-Point Equations on omega-Continuous Semirings.
Proceedings of the 6th Workshop on Fixed Points in Computer Science, 2009

2008
Abstraction Refinement with Craig Interpolation and Symbolic Pushdown Systems.
J. Satisf. Boolean Model. Comput., 2008

Convergence Thresholds of Newton's Method for Monotone Polynomial Equations.
Proceedings of the STACS 2008, 2008

Solving Monotone Polynomial Equations.
Proceedings of the Fifth IFIP International Conference On Theoretical Computer Science, 2008

Newton's Method for omega-Continuous Semirings.
Proceedings of the Automata, Languages and Programming, 35th International Colloquium, 2008

Approximative Methods for Monotone Systems of Min-Max-Polynomial Equations.
Proceedings of the Automata, Languages and Programming, 35th International Colloquium, 2008

2007
On the convergence of Newton's method for monotone systems of polynomial equations.
Proceedings of the 39th Annual ACM Symposium on Theory of Computing, 2007

On Fixed Point Equations over Commutative Semirings.
Proceedings of the STACS 2007, 2007

An Extension of Newton's Method to <i>omega</i> -Continuous Semirings.
Proceedings of the Developments in Language Theory, 11th International Conference, 2007


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