Zephyrinus C. Okonkwo

Born: August 26, 1956; place: Ikenanzizi Imo Nigeria

B. Sc.- The University of Lagos (1982), M. Phil. (Engineering Analysis), The University of Lagos (1985)

Ph. D. Mathematics (1994) University of Texas at Arlington
thesis: Control Problems in the Class of Linear Quadratic Systems; Advisor: Constantin Corduneanu

Associate Professor of Department of Math and Computer Science, Albany State University, Albany, GA

personal or universal URL:
email:

RESEARCH

PUBLICATIONS

1. Okonkwo, Zephyrunus C. Singular perturbation problems for stochastic functional differential equations with causal operators. Dynamic systems and applications, Vol. 3 (Atlanta, GA, 1999), 475--482, Dynamic, Atlanta, GA, 2001.
2. Okonkwo, Zephyrinus C.; Turner, James C.; Rowe, Errol G. Stability of stochastic functional differential equations involving abstract Volterra operators. Int. J. Differ. Equ. Appl. 3 (2001), no. 1, 59--78.
3. Okonkwo, Zephyrinus C. Stochastic functional differential equations with abstract Volterra operators. I. Existence of solutions. Volterra equations and applications (Arlington, TX, 1996), 373--384, Stability Control Theory Methods Appl., 10, Gordon and Breach, Amsterdam, 2000.
4. Okonkwo, Zephyrinus C. Optimal control for Itô-type systems with partial initial conditions. Commun. Appl. Anal. 4 (2000), no. 2, 257--266.
5. Okonkwo, Zephyrinus C.; Rowe, Errol G. On neutral stochastic functional-differential equations with causal operators. Int. J. Appl. Math. 2 (2000), no. 1, 131--140.
6. Okonkwo, Zephyrinus C.; Ladde, Gangaram S. Itô-type stochastic differential systems with abstract Volterra operators and their control. Dynam. Systems Appl. 6 (1997), no. 4, 461--468.
7. Okonkwo, Zephyrinus C. Admissibility and optimal control for difference equations. Dynam. Systems Appl. 5 (1996), no. 4, 627--634.
8. Okonkwo, Z. C. Admissibility and optimal control for stochastic difference equations. Integral methods in science and engineering (Houghton, MI, 1998), 263--267, Chapman & Hall/CRC Res. Notes Math., 418, Chapman & Hall/CRC, Boca Raton, FL, 2000.
9. Okonkwo, Zephyrinus C. Approximation procedures for an abstract LQ-optimal control problem. Libertas Math. 18 (1998), 159--172.
10. Okonkwo, Zephyrinus C. Two examples in ${\rm LQ}$-optimal control theory. Libertas Math. 13 (1993), 177--182.

references: Dr. Okonkwo; Mathematical Reviews.

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