Sigurdur F. Hafstein

58 papers C 15Misc 1Journal 22Unranked 20
YearRankTypeTitle / Venue / Authors
2026 J jnl
Constructing piecewise quadratic Lyapunov functions with linear programming for continuous-time switched and conewise linear systems.
Autom.
Juan Javier Palacios Roman, Sigurdur F. Hafstein, Peter Giesl, Sebastiaan van den Eijnden, Stefania Andersen, W. P. M. H. Heemels
2025 J jnl
The Stability of the Multivariate Geometric Brownian Motion as a Bilinear Matrix Inequality Problem.
SIAM J. Appl. Dyn. Syst.
Gerardo Barrera, Eyleifur Bjarkason, Sigurdur F. Hafstein
2025 — conf
Verifying Positivity of Piecewise Quadratic Lyapunov Functions.
ICINCO (1)
Sigurdur F. Hafstein, Eggert Karl Hafsteinsson
2024 C conf
Application of the Schur Complement in Sum of Squares Optimisation.
ICINCO (1)
Elias August, Sigurdur F. Hafstein, Jacopo Piccini, Stefania Andersen, Anna Bavarsad
2024 J jnl
Construction of a Contraction Metric for Time-Periodic Systems Using Meshless Collocation.
IEEE Control. Syst. Lett.
Peter Giesl, Sigurdur F. Hafstein
2024 C conf
Efficient Implementation of Piecewise Quadratic Lyapunov Function Computations for Switched Linear Systems.
ICINCO (1)
Stefania Andersen, Sigurdur F. Hafstein, Juan Javier Palacios Roman, S. J. A. M. van den Eijnden
2024 — conf
Stability Analysis of Hybrid Integrator-Gain Systems using Linear Programming.
ADHS
Juan Javier Palacios Roman, Sigurdur F. Hafstein, Sebastiaan J. A. M. van den Eijnden, Marcel François Heertjes, W. P. M. H. Heemels
2024 J jnl
The stability of the multivariate geometric Brownian motion as a bilinear matrix inequality problem.
CoRR
Gerardo Barrera, Eyleifur Bjarkason, Sigurdur F. Hafstein
2023 J jnl
Common Lyapunov Functions for Switched Linear Systems: Linear Programming-Based Approach.
IEEE Control. Syst. Lett.
Stefania Andersen, Peter Giesl, Sigurdur F. Hafstein
2023 — conf
Contraction Metrics by Numerical Integration and Quadrature: Uniform Error Estimate.
ICINCO (1)
Peter Giesl, Sigurdur F. Hafstein, Iman Mehrabinezhad
2023 J jnl
Linear Programming based Lower Bounds on Average Dwell-Time via Multiple Lyapunov Functions.
CoRR
Sigurdur F. Hafstein, Aneel Tanwani
2023 J jnl
Linear programming based lower bounds on average dwell-time via multiple Lyapunov functions.
Eur. J. Control
Sigurdur F. Hafstein, Aneel Tanwani
2023 C conf
Lyapunov Function Computation for Linear Switched Systems: Comparison of SDP and LP Approaches.
SIMULTECH
Stefania Andersen, Elias August, Sigurdur F. Hafstein, Jacopo Piccini
2023 J jnl
Lyapunov Functions for Switched Linear Systems: Proof of Convergence for an LP Computational Approach.
IEEE Control. Syst. Lett.
Sigurdur F. Hafstein
2023 — conf
Positively Invariant Sets for ODEs and Numerical Integration.
ICINCO (1)
Peter Giesl, Sigurdur F. Hafstein, Iman Mehrabinezhad
2023 J jnl
Sufficient Stability Conditions for a Class of Switched Systems With Multiple Steady States.
IEEE Control. Syst. Lett.
Jacopo Piccini, Elias August, Sigurdur F. Hafstein, Stefania Andersen
2023 J jnl
Triangulations and Error Estimates for Interpolating Lyapunov Functions.
SN Comput. Sci.
Peter Giesl, Sigurdur F. Hafstein
2022 J jnl
A Projected Subgradient Method for the Computation of Adapted Metrics for Dynamical Systems.
SIAM J. Appl. Dyn. Syst.
Mauricio S. Louzeiro, Christoph Kawan, Sigurdur F. Hafstein, Peter Giesl, Jinyun Yuan
2022 J jnl
Robustness of Numerically Computed Contraction Metrics.
SN Comput. Sci.
Peter Giesl, Sigurdur F. Hafstein, Iman Mehrabinezhad
2021 J jnl
A Subgradient Algorithm for Data-Rate Optimization in the Remote State Estimation Problem.
SIAM J. Appl. Dyn. Syst.
Christoph Kawan, Sigurdur F. Hafstein, Peter Giesl
2021 C conf
Comparison of Different Radial Basis Functions in Dynamical Systems.
SIMULTECH
Carlos Argáez, Peter Giesl, Sigurdur F. Hafstein
2021 J jnl
Computation and verification of contraction metrics for exponentially stable equilibria.
J. Comput. Appl. Math.
Peter Giesl, Sigurdur F. Hafstein, Iman Mehrabinezhad
2021 J jnl
Minimization with differential inequality constraints applied to complete Lyapunov functions.
Math. Comput.
Peter Giesl, Carlos Argáez, Sigurdur F. Hafstein, Holger Wendland
2021 C conf
Robustness of Contraction Metrics Computed by Radial Basis Functions.
ICINCO
Peter Giesl, Sigurdur F. Hafstein, Iman Mehrabinezhad
2021 C conf
Uniformly Regular Triangulations for Parameterizing Lyapunov Functions.
ICINCO
Peter Giesl, Sigurdur F. Hafstein
2020 J jnl
Automatic Determination of Connected Sublevel Sets of CPA Lyapunov Functions.
SIAM J. Appl. Dyn. Syst.
Peter Giesl, Conor Osborne, Sigurdur F. Hafstein
2020 C conf
CPA Lyapunov Functions: Switched Systems vs. Differential Inclusions.
ICINCO
Sigurdur F. Hafstein
2020 C conf
Evaluation of Lyapunov Function Candidates through Averaging Iterations.
ICINCO
Carlos Argáez, Peter Giesl, Sigurdur F. Hafstein
2020 J jnl
Simplicial complex with approximate rotational symmetry: A general class of simplicial complexes.
J. Comput. Appl. Math.
Sigurdur Albertsson, Sigurdur F. Hafstein, Peter Giesl, Skuli Gudmundsson
2020 — conf
Sliding Modes and Lyapunov Functions for Differential Inclusions by Linear Programming.
ICINCO (Selected Papers)
Sigurdur F. Hafstein
2019 — conf
Algorithm and Software to Generate Code for Wendland Functions in Factorized Form.
ICINCO (1)
Hjörtur Björnsson, Sigurdur F. Hafstein
2019 — conf
Clustering Algorithm for Generalized Recurrences using Complete Lyapunov Functions.
ICINCO (1)
Carlos Argáez, Peter Giesl, Sigurdur F. Hafstein
2019 J jnl
Computation and verification of contraction metrics for exponentially stable equilibria.
CoRR
Peter Giesl, Sigurdur F. Hafstein, Iman Mehrabinezhad
2019 — conf
Lyapunov Functions for Linear Stochastic Differential Equations: BMI Formulation of the Conditions.
ICINCO (1)
Sigurdur F. Hafstein
2019 — conf
Numerical Analysis Project in ODEs for Undergraduate Students.
ICCS (5)
Sigurdur F. Hafstein
2018 — conf
Computation of Complete Lyapunov Functions for Three-Dimensional Systems.
CDC
Carlos Argáez, Peter Giesl, Sigurdur F. Hafstein
2018 — conf
Construction of a Complete Lyapunov Function using Quadratic Programming.
ICINCO (1)
Peter Giesl, Carlos Argáez, Sigurdur F. Hafstein, Holger Wendland
2018 C conf
Iterative Construction of Complete Lyapunov Functions.
SIMULTECH
Carlos Argáez, Peter Giesl, Sigurdur F. Hafstein
2018 — conf
Local Lyapunov Functions for Nonlinear Stochastic Differential Equations by Linearization.
ICINCO (1)
Hjörtur Björnsson, Peter Giesl, Skuli Gudmundsson, Sigurdur F. Hafstein
2018 J jnl
Probabilistic Basin of Attraction and Its Estimation Using Two Lyapunov Functions.
Complex.
Skuli Gudmundsson, Sigurdur F. Hafstein
2018 — conf
Verification of a Numerical Solution to a Collocation Problem.
ICINCO (1)
Hjörtur Björnsson, Sigurdur F. Hafstein
2017 C conf
Analysing Dynamical Systems - Towards Computing Complete Lyapunov Functions.
SIMULTECH
Carlos Argáez, Sigurdur F. Hafstein, Peter Giesl
2017 — conf
Complete Lyapunov Functions: Computation and Applications.
SIMULTECH (Selected Papers)
Carlos Argáez, Peter Giesl, Sigurdur F. Hafstein
2017 C conf
Efficient Algorithms for Simplicial Complexes Used in the Computation of Lyapunov Functions for Nonlinear Systems.
SIMULTECH
Sigurdur F. Hafstein
2017 Misc conf
Efficient Lyapunov Function computation for systems with multiple exponentially stable equilibria.
ICCS
Jòhann Björnsson, Sigurdur F. Hafstein
2017 — conf
Fast Algorithms for Computing Continuous Piecewise Affine Lyapunov Functions.
SIMULTECH (Selected Papers)
Sigurdur F. Hafstein
2017 C conf
Wendland Functions - A C++ Code to Compute Them.
SIMULTECH
Carlos Argáez, Sigurdur F. Hafstein, Peter Giesl
2015 J jnl
Computation and Verification of Lyapunov Functions.
SIAM J. Appl. Dyn. Syst.
Peter Giesl, Sigurdur F. Hafstein
2014 — conf
Computation of Lyapunov functions for discrete-time systems using the Yoshizawa construction.
CDC
Huijuan Li, Sigurdur F. Hafstein, Christopher M. Kellett
2014 — conf
Computation of continuous and piecewise affine Lyapunov functions by numerical approximations of the Massera construction.
CDC
Johann Bjornsson, Peter Giesl, Sigurdur F. Hafstein, Christopher M. Kellett, Huijuan Li
2014 C conf
Continuous and piecewise affine Lyapunov functions using the Yoshizawa construction.
ACC
Sigurdur F. Hafstein, Christopher M. Kellett, Huijuan Li
2014 C conf
Implementation of a fan-like triangulation for the CPA method to compute Lyapunov functions.
ACC
Peter Giesl, Sigurdur F. Hafstein
2013 C conf
Implementation of Simplicial Complexes for CPA Functions in C++11 using the Armadillo Linear Algebra Library.
SIMULTECH
Sigurdur F. Hafstein
2011 J jnl
Efficient Sampling of Saddle Points with the Minimum-Mode Following Method.
SIAM J. Sci. Comput.
Andreas Pedersen, Sigurdur F. Hafstein, Hannes Jónsson
2004 — conf
Future of Traffic Information: Online-Simulation of a Large Scale Freeway Network.
ICWI
Florian Mazur, Roland Chrobok, Sigurdur F. Hafstein, Andreas Pottmeier, Michael Schreckenberg
2004 — conf
OLSIM: Inter-urban Traffic Information.
IICS
Daniel Weber, Roland Chrobok, Sigurdur F. Hafstein, Florian Mazur, Andreas Pottmeier, Michael Schreckenberg
2004 — conf
OLSIM: Up-to-date traffic information on the web.
Communications, Internet, and Information Technology
Andreas Pottmeier, Roland Chrobok, Sigurdur F. Hafstein, Florian Mazur, Michael Schreckenberg
2004 J jnl
Traffic Forecast in Large Scale Freeway Networks.
Int. J. Bifurc. Chaos
Roland Chrobok, Andreas Pottmeier, Sigurdur F. Hafstein, Michael Schreckenberg