Associate Professor

Department of Mathematics & Statistics

Texas Tech University

Box 41042,

Lubbock, TX 79409-1042

Office: ** Math 203**

Phone: **(806) 834-1747**

Fax: **(806) 742-1112**

Email: ** raegan.higgins@ttu.edu**

- Degrees: Doctorate of Philosophy (2008); Masters of Science (2004)
- Major: Mathematics
- Emphasis: Time Scales
- Advisors: Lynn Erbe, Ph.D. and Allan Peterson, Ph.D.

- Degree: Bachelor of Science
- Major: Mathematics
- Minor: Computer Science
- Advisor: Vlajko Kocic, Ph.D.

All course material can be found on *
Blackboard.*

The department offers free tutoring in the Tutoring and Study Center.

MATH 1452: Calculus II with Applications Student Comments

MATH 1451: Calculus I with Applications Student Comments

MATH 3351: Higher Mathematics for Engineers and Scientists II Student Comments

MATH 5319: Intermediate Analysis II Student Comments

MATH 5318: Intermediate Analysis I Student Comments

MATH 3350: Higher Mathematics for Engineers and Scientists I Student Comments

MATH 1352: Calculus II Student Comments

MATH 1351: Calculus I Student Comments

My research is in the area of time scales. The calculus of time scales was developed to unify and extend results obtained for differential equations and difference equations. Currently, my focus is on oscillation criteria for certain linear and nonlinear second order dynamic equations. I am also interested in applications of time scales to mathematical biology and issues that affect pre-service teachers ability to teach mathematics.

Current Collaborators

- Dr. Vlajko Kocic and Dr. Yevgeniy Kostrov at Xavier University of Louisiana
- Dr. Elvan Akin at Missouri University of Science and Technology

Journal Articles

- M. Advir, E. Akin, and R. Higgins,
Oscillatory behavior of solutions of third-order delay and advanced dynamic equations,
*Journal of Inequalities and Applications*, (2014), no 1, 1-15. - T. Stevens, Z. Aguirre-Munoz, G. Harris, R. Higgins, and X. Liu,
Middle Level Mathematics Teachers' Self-Efficacy Growth through Professional Development: Differences Based on
Mathematical Background,
*Australian Journal of Teacher Education*, 38 (2013), no 4. - R. Higgins, Oscillation of a Second-order Linear Delay Dynamic Equation,
*Communications in Applied Analysis*, 16 (2012), no 3, 403-414. - T. Stevens, G. Harris, and R. Higgins, A professional development model for middle school of mathematics,
*International Journal of Mathematical Education in Science and Technology*, 42 (2011), no 7, 951-961. - R. Higgins, Oscillation of second-order dynamic equations,
*International Journal of Dynamical Systems and Differential Systems*, 3 (2011), no 1/2, 189-205. - R. Higgins, Asymptotic behavior of second-order nonlinear dynamic equations on time scales,
*Discrete and Continuous Dynamical Systems Series B*, 13 (2010), no 13, 609-622. - R. Higgins, Oscillation results for second-order delay dynamic equations,
*International Journal of Difference Equations*, 5 (2010), no 1, 41-54. - R. Higgins, Some oscillation criteria for second-order delay dynamic equations,
*Applicable Analysis and Discrete Mathematics*, 4 (2010), no 2, 322-337. - R. Higgins, Some oscillation results for second order functional dynamic equations,
*Advances in Dynamical Systems and Applications*, 5 (2010) no 1, 87-105. - L. Erbe and R. Higgins, Some oscillation results for second order functional dynamic equations,
*Advances in Dynamical Systems and Applications*, 3 (2008), no 1, 73-88.

*Conference Proceedings*

- T. Stevens, G. Harris, R. Higgins, Z. Aguirre-Munoz, and X. Liu, Rigorous Math Courses for Middle-school Math Teachers,
*Proceedings of the 41st Annual Meeting of the Research Council on Mathematics Learning*, (2014), 17-24. - R. J. Higgins and A. Peterson, Cauchy Functions and Taylor's Formula for Time Scales,
*Proceedings of the the Sixth International Conference on Difference Equations*, (2004), 299-308.

*Manuscripts under Review*

- R. Higgins, Oscillation of Second-Order Dynamic Equations.
- Thesis
- R. J. Higgins, Oscillation Theory of Dynamic Equations on Time Scales, Department of Mathematics and Statistics, University of Nebraska-Lincoln, 2008.