Photo file: 
Full name: 
Erik I Verriest
Job title: 
Professor
Email address: 
Work phone: 
404/894-2949
Fax: 
404.894.5935
Office: 
VL 492

Erik I. Verriest received the degree of 'Burgerlijk Electrotechnisch Ingenieur' from the State University of Ghent, Ghent, Belgium in 1973, and the M.Sc. and Ph.D. degrees from Stanford University in 1975 and 1980, respectively.

He was employed by the Control Systems Laboratory and the Hybrid Computation Centre, Ghent, Belgium, where he worked on process simulation and control in 1973-74. His doctoral research at Stanford was on the algebraic theory and balancing for time varying linear systems and array algorithms. He joined the faculty of Electrical and Computer Engineering at Georgia Tech in 1980. He spent the 1991-92, 1993-94 and 1994-95 academic years at Georgia Tech Lorraine.

He has contributed to the application of the theory of systems over finite fields in cryptography, data compression, sensitivity analysis of array algorithms with applications in estimation and control, algorithms for optical computing. More recently he contributed to the theory of periodic and hybrid systems, delay - differential systems, model reduction for nonlinear systems, and control with communication constraints. He served on several IPC's and is a member of the IFAC Committee on Linear Systems.

Research interests: 
  • Mathematical system theory
  • Delay-differential equations
  • Model reduction and balancing for nonlinear systems
  • Optimal control and control with information constraints
  • Periodic and hybrid systems
  • Applied mathematics
Distinctions: 
  • Francqui Fellow (1974) - Belgian American Educational Foundation
  • Member, Sigma Xi
  • Member, Phi Kappa Phi
  • Senior Member, IEEE

J.M. Dion, L. Dugard, S.I. Niculescu, Erik I. Verriest: "Stability and Robust Stability of Time-delay Systems: A Guided Tour," Stability and Control of Time-delay Systems, vol. 228, p. 171, 1998.

S.I. Niculescu, Erik I. Verriest: "Delay-independent Stability of Linear Neutral Systems: A Riccati Equation Approach," Stability and Control of Time-delay System, vol. 228, pp. 92-100, 1998.

Erik I. Verriest: "Graphical Test for Robust Stability with Distributed Delayed Feedback," Stability and Control of Time-delay Systems, vol. 228, pp. 117-139, 1998.

Erik I. Verriest: "Existence and Uniqueness for a Variational Problem," SIAM Review, vol. 40, no. 2, pp. 132-142, 1998.

Erik I. Verriest: "Algebraic Methods in Functional Equations: General Realization Theory," MAA 77th Annual Meeting, Charleston, SC, 1998.

Erik I. Verriest: Stability and Control of Time-delay Systems, Springer-Verlag, Lecture Notes in Control and Information Sciences, vol. 228, 1998.

Erik I. Verriest: "A Stochastic Extension of La Salle's Theorem," invited paper, World Automation Congress, IFAC, Anchorage, AK, 1998.

K. Narayanan, Erik I. Verriest: "An Excursion in Finite Field Valued Measures and a Decomposition of Integer Valued Random Variables," 1997 IQSA Meeting, Atlanta, GA, 1997.

Erik I. Verriest: "Graphical Test for Robust Stability with Distributed Delayed Feedback," invited paper, Proceedings of the European Control Conference, TU-A D3 1-6, Brussels, Belgium, 1997.

Erik I. Verriest: "Robust Stability and Stabilization of Deterministic and Stochastic Time-delay Systems," Journal Europeen des Systemes Automatises, vol. 31, no. 6, pp. 1015-1024, 1997.

S.I. Niculescu, Erik I. Verriest: "Delay-independent Stability of Linear Neutral Systems: A Riccati Equation Approach," invited paper, Proceedings of the European Control Conference, TU-A D4 1-5, Brussels, Belgium, 1997.

W.S. Gray, Erik I. Verriest: "A Stochastic Approach to Control for Maximal Accuracy," Proceedings of the 26th Confoerence on Decision and Control, vol. 2, pp. 1395-1396, January, 1997.

Erik I. Verriest: "Stability and Stabilization of Discrete Time Systems with Multiplicative Noise," invited paper, Proceedings of the European Control Conference, TU-A D4 1-5, Brussels, Belgium, 1997.

J.A. Ramos, Erik I. Verriest: "Total Least Squares Fitting of Two Point Sets in m-D," Proceedings of the 36th IEEE Conference on Decision and Control, vol. 5, pp. 5048-5054, January, 1997.

Erik I. Verriest: "Identification of Multi-mode and Hidden Markov Models," The SIAM 45th Anniversary Meeting, Abstract, CP-2, Stanford, CA, 1997.

Erik I. Verriest: "Practical Issues in Control: Delay Effects and Accuracy," presented at NASA Marshall Space Flight Center, Huntsville, AL, 1997.

Erik I. Verriest: "Robust Stability and Stabilization of Deterministic and Stochastic Time-Delay Systems," invited paper in Actes du Colloque: Analyse et Commande des Systemes avec Retards, pp. 197-206, 1996.

Erik I. Verriest: "A Conditional Trace Inequality," solution to problem 95-8 (by P.A. Roerdiger), acknowledged in SIAM Review, vol. 38, no. 2, pp. 324-426, 1996.

Erik I. Verriest: "Riccati-Type Conditions for Robust Stability of Delay Systems," invited presentation at the 1996 Conference on Mathematical Theory of Networks and Systems, St. Louis, MO, 1996.

Erik I. Verriest: "Riemannian Maximal Accuracy Control," invited presentation at the 1996 Conference on Mathematical Theory of Networks and Systems, St. Louis, MO, 1996.

Erik I. Verriest: "Structure and Parametrization of Periodic Linear Systems," invited presentation at the 1996 Conference on Mathematical Theory of Networks and Systems, St. Louis, MO, 1996.

Erik I. Verriest: "Minimum Sensitivity Design via Gradient Flow Techniques," Proceedings of the 34th IEEE Conference on Decision and Control, pp. 518-523, January, 1995.

Erik I. Verriest: "Feedback Stabilization via the Stochastic Artstein Theorem," Proceedings of the Third European Control Conference, pp. 916-918, 1995.

Erik I. Verriest: "Minimum Sensitivity Design of Linear Systems," invited presentation at the Workshop on Robust Control, Rijks Universiteit Groningen, Groningen, The Netherlands, 1995.

A.F. Ivanov, Erik I. Verriest: "Robust Stability of Delay-Difference Equations," Proceedings of the 34th IEEE Conference on Decision and Control, pp. 386-391, January, 1995.

Erik I. Verriest: "Stability of Systems with Distributed Delays," invited paper in Proceedings of the IFAC Conference on System Structure and Control, pp. 294-299, 1995.

Erik I. Verriest: "Stability and Stabilization of Stochastic Systems with Distributed Delays," Proceedings of the 34th IEEE Conference on Decision and Control, pp. 2205-2210, January, 1995.

Erik I. Verriest: "Logics in Realization and Modeling from Data," International Journal of Theoretical Physics, vol. 34, no. 8, pp. 1775-1785, 1995.

W.S. Gray, Erik I. Verriest: "Optimal Control for the Maximal Accuracy with Arbitrary Control Space Metric," Proceedings of the 34th IEEE Conference on Decision and Control, pp. 3914-3919, January, 1995.

S. Dumitru, Erik I. Verriest: "Behavior Patterns of Observables in the Quantum-Classical Limit," International Journal of Theoretical Physics, vol. 34, no. 8, pp. 1785-1789, 1995.

Last revised May 10, 2016