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Sigurður Freyr Hafstein (aka Marinosson), dr. rer. nat.

PUBLICATIONS

Monograph, peer-reviewed:

Journal Articles, peer-reviewed:

Book Chapters, peer-reviewed:

  • P. Giesl and S.F Hafstein.
    Local Lyapunov Functions for periodic and finite-time ODEs.
    In: Recent Trends in Dynamical Systems,
    eds. A. Johann, H.Kruse, F. Rupp, and S. Schmitz, Springer 2013.

  • R. Selten, M. Schreckenberg, T. Chmura, T. Pitz, S. Kube,
    S.F. Hafstein, R. Chrobok, A. Pottmeier, and J. Wahle.
    Experimental Investigation of Day-to-Day Route-Choice Behavior
    and Network Simulations of Autobahn Traffic in North Rhine-Westphalia.
    In: Human Behaviour and Traffic Networks,
    eds. M. Schreckenberg and R. Selten,
    Springer 2004, pp. 1-21.
    (R. Selten received the Nobel-Prize in Economics 1994)

Conference Proceedings, peer-reviewed:

  • H. Li, S. Hafstein, and C. Kellett.
    Computation of Lyapunov Functions for Discrete-Time Systems using the Yoshizawa Construction.
    In: Proceedings of the 53rd IEEE Conference on Decision and Control (CDC),
    Los Angeles, CA, USA, 2014, pp. 5512-5517.

  • J. Björnsson, P. Giesl, S. Hafstein, C. Kellett, and H. Li.
    Computation of continuous and piecewise affine Lyapunov functions by numerical approximations of the Massera construction.
    In: Proceedings of the 53rd IEEE Conference on Decision and Control (CDC),
    Los Angeles, CA, USA, 2014, pp. 5506-5511.

  • R. Baier and S.F. Hafstein.
    Numerical Computation of Control Lyapunov Functions in the Sense of Generalized Gradients.
    In: Proceedings of the 21st International Symposium on Mathematical Theory of Networks and Systems (MTNS),
    Groningen, The Netherlands, 2014, no. 0232, pp. 1173-1180.

  • J. Björnsson, P. Giesl, and S. Hafstein.
    Algorithmic verification of approximations to complete Lyapunov functions.
    In: Proceedings of the 21st International Symposium on Mathematical Theory of Networks and Systems (MTNS),
    Groningen, The Netherlands, 2014, no. 0180, pp. 1181-1188.

  • H. Li, R. Baier, L. Grüne, S.F. Hafstein, and F. Wirth.
    Computation of Local ISS Lyapunov Functions Via Linear Programming.
    In: Proceedings of the 21st International Symposium on Mathematical Theory of Networks and Systems (MTNS),
    Groningen, The Netherlands, 2014, no. 0158, pp. 1189-1195.

  • S. Hafstein, C.M. Kellett, and H. Li.
    Continuous and Piecewise Affine Lyapunov Functions using the Yoshizawa Construction.
    In: Proceedings of the 2014 American Control Conference,
    Portland (OR), USA, 2014, no. 0170, pp. 548-553.

  • P. Giesl and S. Hafstein.
    Implementation of a Fan-Like Triangulation for the CPA Method to compute Lyapunov Functions.
    In: Proceedings of the 2014 American Control Conference,
    Portland (OR), USA, 2014, no. 0202, pp. 2989-2994.

  • S.F. Hafstein.
    Implementation of Simplicial Complexes for CPA functions in C++11 using the Armadillo Linear Algebra Library.
    In: Proceedings of SIMULTECH 2013,
    Reykjavik, Iceland, 2013, pp. 49-57.

  • R. Baier, L. Grüne, and S.F. Hafstein.
    Computing Lyapunov functions for strongly asymptotically stable differential inclusions.
    In: Proceedings of NOLCOS 2010,
    Bologna, Italy, 2010.

  • D. Weber, R. Chrobok, S. Hafstein, F. Mazur, A. Pottmeier, and M. Schreckenberg.
    OLSIM: Inter-urban Traffic Information.
    In: Innovative Internet Community Systems: 4th International Workshop,
    Guadalajara, Mexico, 2004, pp. 296-306.

  • F. Mazur, R. Chrobok, S.F. Hafstein, A. Pottmeier, and M. Schreckenberg.
    Future of Traffic Information - Online-Simulation of a Large Scale Freeway Network.
    In: IADIS International Conference WWW/Internet 2004, Proceedings Volume 1.
    Madrid, Spain, October 2004, pp. 665-672.

  • F. Mazur, R. Chrobok, S.F. Hafstein, A. Pottmeier, and M. Schreckenberg.
    Online-Simulation North Rhine-Westphalia - Traffic Information in a Large Scale Freeway Network.
    In: 2nd Conference of the Euro-regional Projects (i2tern),
    Intelligent Infrastructure for the Trans-European Road Network,
    Vienna, Austria, 2004, pp. 140-144.

  • R. Chrobok, S.F. Hafstein, A. Pottmeier, and M. Schreckenberg.
    OLSIM: Future Traffic Information.
    In: Proceedings of the IASTED International Conference,
    Applied Simulation and Modelling.
    Rhodes, Greece, 2004, doc. nr. 443-142 on CD.

  • A. Pottmeier, S.F. Hafstein, R. Chrobok, J. Wahle, and M. Schreckenberg.
    The Traffic State of the Autobahn Network of North Rhine-Westphalia:
    An Online Traffic Simulation.
    In: Proceedings of the 10th World Congress and Exhibition on
    Intelligent Transport Systems and Services,
    Solutions for Today... and Tomorrow,
    Madrid, Spain, 2003, doc. nr. 2377 on CD.

  • M. Schreckenberg, R. Chrobok, S.F. Hafstein, and A. Pottmeier.
    OLSIM - Traffic Forecast and Planning using Simulations.
    In: SCS/ASIM - 17. Symposium in Magdeburg, Simulationstechnik,
    ed. R. Hohmann,
    Magdeburg, Germany, 2003, pp. 11-18.

  • S.F. Hafstein, R. Chrobok, A. Pottmeier, J. Wahle, and M. Schreckenberg.
    Cellular Automaton Modeling of the Autobahn Traffic in North Rhine - Westphalia.
    In: Proceedings of the 4-th MATHMOD Vienna, 4-th IMCAS Symposium on
    Mathematical Modelling, ARGESIM Report no. 24,
    ed. I. Troch and F. Breitenecker,
    Vienna, Austria, 2003, pp. 1322-1331.

  • S.F. Marinosson, R. Chrobok, A. Pottmeier, J. Wahle, and M. Schreckenberg.
    Simulation Framework for the Autobahn Traffic in North Rhine-Westphalia.
    In: Cellular Automata, proceedings of ACRI 2002, the 5th International
    Conference on Cellular Automata for Research and Industry,
    ed. S. Bandini, B. Chopard and M. Tomassini,
    Geneve, Switzerland, 2002, pp. 315-324.

  • S.F. Marinosson, R. Chrobok, A. Pottmeier, J. Wahle, and M. Schreckenberg.
    Simulation des Autobahnverkehrs in NRW.
    In: SCS/ASIM - 16. Symposium in Rostock,
    Simulationstechnik,
    ed. D. Tavangarian and R. Grützner,
    Rostock, Germany, 2002, pp. 517-523.
    (in German)

  • J. Wahle, R. Chrobok, A. Pottmeier, S.F. Marinosson, and M. Schreckenberg.
    An Online Simulation for the Freeway Network of
    North Rhine-Westphalia Based on Real-World Traffic Data
    In: GI-Technologien für Verkehr und Logistik, IfGI-Prints 13,
    ed. J. Möltgen and A. Wytzisk,
    Münster, Germany, 2002, pp. 193-210.

  • R. Chrobok, A. Pottmeier, S.F. Marinosson, and M. Schreckenberg.
    On-Line Simulation and Traffic Forecast: Applications and Results.
    In: 6th IASTED International Conference,
    Internet and Multimedia Systems and Applications,
    ed. M. H. Hamza,
    Kaua'i, Hawaii, USA, 2002, pp. 113-118.

  • O.v. Laak, S.F. Marinosson, T. Möllers, and H.J. Wenz.
    Control of a Chemical Process by Multi Regional State Space Systems.
    In: Proceedings of the European Control Conference 1999, f1020-5, Karlsruhe, Germany.

  • O.v. Laak, S.F. Marinosson, T. Möllers, and H.J. Wenz.
    Stability of Fuzzy Systems based on an Approximation Argument.
    In: Proceedings of EUFIT 1999, AC1-1, Aachen, Germany.

Articles, not peer-reviewed:

  • S.F. Hafstein.
    Continuity of scalar-fields characterized by smooth paths fulfilling |s(t)||s'(t)|<+\infty.
    arXiv:1302.3411v1 (2013).

  • R. Chrobok, S.F. Hafstein, A. Pottmeier, and M. Schreckenberg.
    Simulation des Autobahnverkehrs in NRW:
    Aktuelle Verkehrslage und -prognose via Internet.
    In: it_trends: potenziale der metropolregion ruhr, pp. 13-22, Projekt Ruhr, Essen (2004).
    (in German)

  • S.F. Hafstein.
    A constructive converse Lyapunov theorem on asymptotically
    stable differential equations' equilibria.
    The nonlinear autonomous case.
    Schriftenreihe des Instituts für Mathematik, University Duisburg-Essen
    SM-DU-576, (2004).

  • G. Törner, O. Annen, and S.F. Marinosson.
    Bestimmung optimaler Standorte
    zur Erfassung von Verkehrsflüssen am Beispiel des Güterzugnetzes von DB Cargo.
    OR-News 11 (2001), pp. 23-26.
    (in German)

Thesis: