Tryphon T. Georgiou

Tryphon T. Georgiou
Born (1956-10-18) October 18, 1956
Athens, Greece
Known for
Academic background
Education
ThesisPartial realization of covariance sequences (1985)
Doctoral advisorRudolf Emil Kalman
Academic work
InstitutionsUniversity of California, Irvine
University of Minnesota
Main interests

Tryphon Thomas Georgiou (/ˈɡiːɔːrdʒuː/, Greek: Τρύφων Θωμάς Γεωργίου pronounced [ˈtrifon θoˈmas ʝeorˈʝiu]; born 18 October 1956) is a Greek and American electrical engineer and applied mathematician. He has made contributions to control theory and dynamical systems. Since 2016, he has been a distinguished professor of mechanical and aerospace engineering at the University of California, Irvine (UCI).

Early life and education

Georgiou was born in Athens in 1956. He earned a diploma in Mechanical and Electrical Engineering from the National Technical University of Athens in 1979 and a doctorate in electrical engineering from the University of Florida in 1983. He was advised by Rudolf E. Kálmán and wrote a dissertation on covariance sequences in stochastic control.[1]

Career

After completing his doctorate, Georgiou joined the faculty of Florida Atlantic University in 1983 and Iowa State University in 1986. He joined the University of Minnesota in 1989, where he was professor for nearly three decades and director of the Control Science and Dynamical Systems Center beginning in 1990.[2] He also served as Vincentine Hermes-Luh Chair in Electrical and Computer Engineering from 2002 to 2016.[3]

His research specializes in control theory, with an emphasis on stochastic and robust control. He made contributions to the development of the gap metric[4][5] for measuring distances between dynamical systems and analyzing feedback robustness, including extensions to nonlinear systems. In 1997, he developed the large-gain theorem, providing quantitative conditions for stability in both linear and nonlinear settings, and worked on the separation principle in stochastic control.[6][7] Along with Malcolm C. Smith, Christopher I. Byrnes, and Anders Lindquist, Georgiou also works on stochastic control problems, including state covariance steering and Linear-quadratic-Gaussian control. He has also made contributions to network models for disease spread in epidemiology,[8][9] market fragility in financial systems,[10] and neural connectivity in the brain.[11][12]

In 2016, he became a distinguished professor at the Samueli School of Engineering at UC Irvine.[2] He has been on the board of governors for the IEEE since 2002.[2] He is a fellow of the International Federation of Automatic Control (IFAC) since 2016 and the Society for Industrial and Applied Mathematics (SIAM) since 2021.[2]

Awards

References

  1. ^ Georgiou, Tryphon T. (17 March 2017). "To Rudolf E. Kalman: A personal Goodbye" (PDF). IEEE Control Systems. Retrieved 11 February 2026.
  2. ^ a b c d "Biography: Tryphon T. Georgiou". georgiou.eng.uci.edu. UC Irvine Engineering. Retrieved 11 February 2026.
  3. ^ "Tryphon Georgiou". cse.umn.edu. University of Minnesota: Department of Electrical and Computer Engineering. Retrieved 11 February 2026.
  4. ^ Georgiou, Tryphon T. (1 October 1988). "On the computation of the gap metric". Systems & Control Letters. 11 (4): 253–257. doi:10.1016/0167-6911(88)90067-9. ISSN 0167-6911. Retrieved 11 February 2026.
  5. ^ Georgiou, T.T.; Smith, M.C. (December 1989). "Optimal robustness in the gap metric". Proceedings of the 28th IEEE Conference on Decision and Control. pp. 2331–2336 vol.3. doi:10.1109/CDC.1989.70590.
  6. ^ Chen, Yongxin; Georgiou, Tryphon T.; Pavon, Michele (1 May 2016). "On the Relation Between Optimal Transport and Schrödinger Bridges: A Stochastic Control Viewpoint". Journal of Optimization Theory and Applications. 169 (2): 671–691. doi:10.1007/s10957-015-0803-z. hdl:11577/3216967. Retrieved 11 February 2026.
  7. ^ Francis, Bruce A.; Georgiou, Tryphon T. (30 September 1988). "Stability theory for linear time-invariant plants with periodic digital controllers". IEEE Transactions on Automatic Control. 33 (9): 820–832. doi:10.1109/9.1310. Retrieved 11 February 2026.
  8. ^ Taghvaei, Amirhossein; Georgiou, Tryphon T.; Norton, Larry; Tannenbaum, Allen (30 November 2020). "Fractional SIR epidemiological models". Scientific Reports. 10 (1): 20882. doi:10.1038/s41598-020-77849-7. ISSN 2045-2322. PMC 7705759. PMID 33257790. Retrieved 11 February 2026.
  9. ^ Khong, Sei Zhen; Su, Lanlan; Georgiou, Tryphon (3 November 2025). "Long-term susceptible fractions in networked epidemic models and their relation to the basic reproduction number". Scientific Reports. 15 (1): 38429. doi:10.1038/s41598-025-22158-0. ISSN 2045-2322. PMC 12583584. PMID 41184313.
  10. ^ Sandhu, Romeil S.; Georgiou, Tryphon T.; Tannenbaum, Allen R. (27 May 2016). "Ricci curvature: An economic indicator for market fragility and systemic risk". Science Advances. 2 (5) e1501495. doi:10.1126/sciadv.1501495. PMID 27386522. Retrieved 11 February 2026.
  11. ^ Farooq, Hamza; Chen, Yongxin; Georgiou, Tryphon T.; Tannenbaum, Allen; Lenglet, Christophe (30 October 2019). "Network curvature as a hallmark of brain structural connectivity". Nature Communications. 10 (1): 4937. doi:10.1038/s41467-019-12915-x. ISSN 2041-1723. PMC 6821808. PMID 31666510.
  12. ^ Fuster, Andrea; Ghosh, Aurobrata; Kaden, Enrico; Rathi, Yogesh; Reisert, Marco (8 April 2016). Computational Diffusion MRI: MICCAI Workshop, Munich, Germany, October 9th, 2015. Springer. p. 55. ISBN 978-3-319-28588-7.
  13. ^ "'Global importance' of UCI researchers honored". Irvine Standard. 4 March 2023. Retrieved 11 February 2026.
  14. ^ "AA: Tryphon T. Georgiou, "Optimal Mass Transport Meets Stochastic Thermodynamics" – 10/30, 4:00 p.m." ECE Advising Blog. University of Washington. Retrieved 17 February 2026.
  15. ^ "Awards & Recognition Program | IEEE Control Systems Society". ieeecss.org. IEEE. Retrieved 17 February 2026.
  16. ^ "Editorial Board | IEEE Control Systems Society". ieeecss.org. IEEE. Retrieved 17 February 2026.
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