Sigurdur F. Hafstein

Publication Activity (10 Years)

Years Active: 2004-2024
Publications (10 Years): 41

Top Topics

Lyapunov Function

Dynamical Systems

Brownian Motion

Top Venues

IEEE Control. Syst. Lett.

SIAM J. Appl. Dyn. Syst.

Publications

Peter Giesl, Sigurdur F. Hafstein
Construction of a Contraction Metric for Time-Periodic Systems Using Meshless Collocation. IEEE Control. Syst. Lett. 8 (2024)
Gerardo Barrera, Eyleifur Bjarkason, Sigurdur F. Hafstein
The stability of the multivariate geometric Brownian motion as a bilinear matrix inequality problem. CoRR (2024)
Stefania Andersen, Peter Giesl, Sigurdur F. Hafstein
Common Lyapunov Functions for Switched Linear Systems: Linear Programming-Based Approach. IEEE Control. Syst. Lett. 7 (2023)
Peter Giesl, Sigurdur F. Hafstein, Iman Mehrabinezhad
Positively Invariant Sets for ODEs and Numerical Integration. ICINCO (1) (2023)
Sigurdur F. Hafstein, Aneel Tanwani
Linear programming based lower bounds on average dwell-time via multiple Lyapunov functions. Eur. J. Control 74 (2023)
Peter Giesl, Sigurdur F. Hafstein, Iman Mehrabinezhad
Contraction Metrics by Numerical Integration and Quadrature: Uniform Error Estimate. ICINCO (1) (2023)
Peter Giesl, Sigurdur F. Hafstein
Triangulations and Error Estimates for Interpolating Lyapunov Functions. SN Comput. Sci. 4 (4) (2023)
Sigurdur F. Hafstein, Aneel Tanwani
Linear Programming based Lower Bounds on Average Dwell-Time via Multiple Lyapunov Functions. CoRR (2023)
Sigurdur F. Hafstein
Lyapunov Functions for Switched Linear Systems: Proof of Convergence for an LP Computational Approach. IEEE Control. Syst. Lett. 7 (2023)
Jacopo Piccini, Elias August, Sigurdur F. Hafstein, Stefania Andersen
Sufficient Stability Conditions for a Class of Switched Systems With Multiple Steady States. IEEE Control. Syst. Lett. 7 (2023)
Stefania Andersen, Elias August, Sigurdur F. Hafstein, Jacopo Piccini
Lyapunov Function Computation for Linear Switched Systems: Comparison of SDP and LP Approaches. SIMULTECH (2023)
Mauricio S. Louzeiro, Christoph Kawan, Sigurdur F. Hafstein, Peter Giesl, Jinyun Yuan
A Projected Subgradient Method for the Computation of Adapted Metrics for Dynamical Systems. SIAM J. Appl. Dyn. Syst. 21 (4) (2022)
Peter Giesl, Sigurdur F. Hafstein, Iman Mehrabinezhad
Robustness of Numerically Computed Contraction Metrics. SN Comput. Sci. 3 (3) (2022)
Peter Giesl, Sigurdur F. Hafstein, Iman Mehrabinezhad
Computation and verification of contraction metrics for exponentially stable equilibria. J. Comput. Appl. Math. 390 (2021)
Carlos Argáez, Peter Giesl, Sigurdur F. Hafstein
Comparison of Different Radial Basis Functions in Dynamical Systems. SIMULTECH (2021)
Peter Giesl, Sigurdur F. Hafstein
Uniformly Regular Triangulations for Parameterizing Lyapunov Functions. ICINCO (2021)
Peter Giesl, Carlos Argáez, Sigurdur F. Hafstein, Holger Wendland
Minimization with differential inequality constraints applied to complete Lyapunov functions. Math. Comput. 90 (331) (2021)
Christoph Kawan, Sigurdur F. Hafstein, Peter Giesl
A Subgradient Algorithm for Data-Rate Optimization in the Remote State Estimation Problem. SIAM J. Appl. Dyn. Syst. 20 (4) (2021)
Peter Giesl, Sigurdur F. Hafstein, Iman Mehrabinezhad
Robustness of Contraction Metrics Computed by Radial Basis Functions. ICINCO (2021)
Sigurdur Albertsson, Sigurdur F. Hafstein, Peter Giesl, Skuli Gudmundsson
Simplicial complex with approximate rotational symmetry: A general class of simplicial complexes. J. Comput. Appl. Math. 363 (2020)
Sigurdur F. Hafstein
CPA Lyapunov Functions: Switched Systems vs. Differential Inclusions. ICINCO (2020)
Sigurdur F. Hafstein
Sliding Modes and Lyapunov Functions for Differential Inclusions by Linear Programming. ICINCO (Selected Papers) (2020)
Carlos Argáez, Peter Giesl, Sigurdur F. Hafstein
Evaluation of Lyapunov Function Candidates through Averaging Iterations. ICINCO (2020)
Peter Giesl, Conor Osborne, Sigurdur F. Hafstein
Automatic Determination of Connected Sublevel Sets of CPA Lyapunov Functions. SIAM J. Appl. Dyn. Syst. 19 (2) (2020)
Peter Giesl, Sigurdur F. Hafstein, Iman Mehrabinezhad
Computation and verification of contraction metrics for exponentially stable equilibria. CoRR (2019)
Hjörtur Björnsson, Sigurdur F. Hafstein
Algorithm and Software to Generate Code for Wendland Functions in Factorized Form. ICINCO (1) (2019)
Sigurdur F. Hafstein
Lyapunov Functions for Linear Stochastic Differential Equations: BMI Formulation of the Conditions. ICINCO (1) (2019)
Sigurdur F. Hafstein
Numerical Analysis Project in ODEs for Undergraduate Students. ICCS (5) (2019)
Carlos Argáez, Peter Giesl, Sigurdur F. Hafstein
Clustering Algorithm for Generalized Recurrences using Complete Lyapunov Functions. ICINCO (1) (2019)
Carlos Argáez, Peter Giesl, Sigurdur F. Hafstein
Iterative Construction of Complete Lyapunov Functions. SIMULTECH (2018)
Hjörtur Björnsson, Sigurdur F. Hafstein
Verification of a Numerical Solution to a Collocation Problem. ICINCO (1) (2018)
Peter Giesl, Carlos Argáez, Sigurdur F. Hafstein, Holger Wendland
Construction of a Complete Lyapunov Function using Quadratic Programming. ICINCO (1) (2018)
Hjörtur Björnsson, Peter Giesl, Skuli Gudmundsson, Sigurdur F. Hafstein
Local Lyapunov Functions for Nonlinear Stochastic Differential Equations by Linearization. ICINCO (1) (2018)
Skuli Gudmundsson, Sigurdur F. Hafstein
Probabilistic Basin of Attraction and Its Estimation Using Two Lyapunov Functions. Complex. 2018 (2018)
Carlos Argáez, Peter Giesl, Sigurdur F. Hafstein
Computation of Complete Lyapunov Functions for Three-Dimensional Systems. CDC (2018)
Carlos Argáez, Peter Giesl, Sigurdur F. Hafstein
Complete Lyapunov Functions: Computation and Applications. SIMULTECH (Selected Papers) (2017)
Sigurdur F. Hafstein
Efficient Algorithms for Simplicial Complexes Used in the Computation of Lyapunov Functions for Nonlinear Systems. SIMULTECH (2017)
Carlos Argáez, Sigurdur F. Hafstein, Peter Giesl
Wendland Functions - A C++ Code to Compute Them. SIMULTECH (2017)
Jòhann Björnsson, Sigurdur F. Hafstein
Efficient Lyapunov Function computation for systems with multiple exponentially stable equilibria. ICCS (2017)
Sigurdur F. Hafstein
Fast Algorithms for Computing Continuous Piecewise Affine Lyapunov Functions. SIMULTECH (Selected Papers) (2017)
Carlos Argáez, Sigurdur F. Hafstein, Peter Giesl
Analysing Dynamical Systems - Towards Computing Complete Lyapunov Functions. SIMULTECH (2017)
Peter Giesl, Sigurdur F. Hafstein
Computation and Verification of Lyapunov Functions. SIAM J. Appl. Dyn. Syst. 14 (4) (2015)
Sigurdur F. Hafstein, Christopher M. Kellett, Huijuan Li
Continuous and piecewise affine Lyapunov functions using the Yoshizawa construction. ACC (2014)
Johann Bjornsson, Peter Giesl, Sigurdur F. Hafstein, Christopher M. Kellett, Huijuan Li
Computation of continuous and piecewise affine Lyapunov functions by numerical approximations of the Massera construction. CDC (2014)
Peter Giesl, Sigurdur F. Hafstein
Implementation of a fan-like triangulation for the CPA method to compute Lyapunov functions. ACC (2014)
Huijuan Li, Sigurdur F. Hafstein, Christopher M. Kellett
Computation of Lyapunov functions for discrete-time systems using the Yoshizawa construction. CDC (2014)
Sigurdur F. Hafstein
Implementation of Simplicial Complexes for CPA Functions in C++11 using the Armadillo Linear Algebra Library. SIMULTECH (2013)
Andreas Pedersen, Sigurdur F. Hafstein, Hannes Jónsson
Efficient Sampling of Saddle Points with the Minimum-Mode Following Method. SIAM J. Sci. Comput. 33 (2) (2011)
Andreas Pottmeier, Roland Chrobok, Sigurdur F. Hafstein, Florian Mazur, Michael Schreckenberg
OLSIM: Up-to-date traffic information on the web. Communications, Internet, and Information Technology (2004)
Florian Mazur, Roland Chrobok, Sigurdur F. Hafstein, Andreas Pottmeier, Michael Schreckenberg
Future of Traffic Information: Online-Simulation of a Large Scale Freeway Network. ICWI (2004)
Roland Chrobok, Andreas Pottmeier, Sigurdur F. Hafstein, Michael Schreckenberg
Traffic Forecast in Large Scale Freeway Networks. Int. J. Bifurc. Chaos 14 (6) (2004)
Daniel Weber, Roland Chrobok, Sigurdur F. Hafstein, Florian Mazur, Andreas Pottmeier, Michael Schreckenberg
OLSIM: Inter-urban Traffic Information. IICS (2004)