- Professor of Mathematics
- Department of Mathematics and Statistics
- University of North Carolina Wilmington
- Wilmington, NC 28403.
- Email: yez@uncw.edu
- Office Phone: 910-962-7381

- My area of interests includes: Analysis, Random Analytic Functions, Complex Dynamic Systems, Complex Differential and Difference Equations.
- My Research Monograph has published by top tier professional publishers
- Nevanlinna's theory of value distribution (with W. Cherry);
Berlin; New York; Hong Kong; London; Paris; Singapore:
**Springer--Verlag**, 2001, (200 pages) - My publications in top tier professional journals
- On Nevanlinna's error terms;
**Duke Mathematical Journal**, 64 (1991), no.2, 243--260. - Structural instability of exponential functions;
**Tran. of the Ame. Of Math. Soc.**, 344 (1994), no.1. 379--389. - Non-Archmedean Nevanlinna theory in several variables and the non-Archimedean Nevanlinna inverse problem (with W. Cherry),
**Tran. of the Ame. Math. Soc.**, 349 (1997), 5043-5071. - On Nevanlinna's second main theorem in projective spaces ;
**Inventiones Mathematicae**, 122 (1995), no. 3, 475--507. - A sharp form of Nevanlinna's second main theorem of several complex variables ;
**Math. Z.**, vol. 222 no. 1 (1996), 81--95. - A class of second order differential equations (with L. Liao);
**Israel J. of Math.**, 146 (2005), 281-303. - An analogue of continued fractions in number theory for Nevanlinna theory;
**Trans. of the Amer. Math. Soc.**, vol 356, no. 12, (2004), 4829-4838. - Algebraic differential equations with functional coefficients concerning Zeta and Gamma (with B. Q. Li),
**J. Differential Equations**, 260 (2016), no. 2, 1456--1464. - A list of publications can be found from
__MATH REVIEWS__.

- I supervised 3 Ph.D students' dissertations in mathematics, many M.S. Students' theses and undergraduate students' research projects.
- I taught more than 20 different undergraduate courses and 9 different graduate courses in my career.
- Recent Courses I taught
- Calculus I (MAT 161),
__Sample Final Exam__and__Sample Maple Project__ - Calculus II (MAT 162),
__Sample Final Exam__and__Sample Maple Project__ - Intermediate analysis (MAT 311),
__Sample Final Exam__ - Linear algebra (MAT 335),
__Sample Final Exam__ - Differential equations (MAT 361),
__Sample Final Exam__ - Real analysis I (MAT 411)
- Real Analysis I (MAT 511)
- Real Analysis (MAT 513),
__Sample Final Exam__ - Complex Analysis (MAT 515),
__Sample Final Exam__