**Website: www.people.vcu.edu/~nlortiz**

**EDUCATION**

Ph. D. Mathematics, Louisiana State University, 2005

Dissertation: Dynamical Systems with Time Delays

Advisor: Prof. Peter Wolenski

M.S. Mathematics, Louisiana State University, 2001

B.S. Computer Science, University of Louisiana, Lafayette, 1996

**RESEARCH**

My research focuses on the study of conditions for optimality of various optimal control problems under non-smooth settings.

**SELECTED PUBLICATIONS**

- N. Ortiz-Robinson, V.R. Rios,
*Forward Euler solutions and weakly invariant time-delayed systems*, Abstract and Applied Analysis Volume 2012 (2012), Article ID 4818532012. IF: 1.318 - N. Ortiz-Robinson,
*Necessary conditions for a class of optimal multiprocess problems with equality constraints*, Proceedings of the American Control Conference, Baltimore, MD, 2010. - D. Chan, C. Kent, N. Ortiz-Robinson,
*Convergence results on a second-order rational difference equation with quadratic terms*, Adv. Difference Eqns. Vol. 2009 Article: 985161 (2009). - N. Ortiz-Robinson, A. J. Ellington,
*Learner-centered strategies and advanced mathematics*, PRIMUS, 19 Issue 5 (2009), 463-472. IF:0.494 - N. Ortiz,
*Existence and a decoupling technique for the neutral problem of Bolza with multiple varying delays*. Geometric Control and Nonsmooth Analysis, 248–259, Ser. Adv. Math. Appl. Sci., 76, World Sci. Publ., Hackensack, NJ, 2008.

**PROFESSIONAL APPOINTMENTS **

2014-present Assistant Chair, VCU Department of Mathematics and Applied Mathematics

2013-14 Interim Chair, VCU Department of Mathematics and Applied Mathematics

2009-present Associate Professor, VCU Department of Mathematics and Applied Mathematics

2005-2009 Assistant Professor, VCU Department of Mathematics and Applied Mathematics