Dr. Xiang-Sheng Wang

Department of Mathematics
Southeast Missouri State University
Cape Girardeau, Missouri, 63701

Office:JH 203

How to pronounce the 'X' in my name?




Research Interests

Approximation theory, asymptotic analysis, and their applications in orthogonal polynomials, differential equations, mathematical biology, physics and statistics.


  1. B. Costa Lima, M. R. Grasselli, X.-S. Wang and J. Wu, Destabilizing a stable crisis: Employment persistence and government intervention in macroeconomics, Structural Change and Economic Dynamics 30 (2014), 30-51.
  2. D. Dai, M. E. H. Ismail and X.-S. Wang, Plancherel-Rotach asymptotic expansion for some polynomials from indeterminate moment problems, Constructive Approximation 40 (2014), 61-104.
  3. C. Paulhus and X.-S. Wang, Global stability analysis of a delayed SIS epidemic model, Journal of Biological Dynamics (2014), DOI: 10.1080/17513758.2014.931474.
  4. X. Shi, X.-S. Wang and N. Reid, Saddlepoint approximation of nonlinear moments, Statistica Sinica 24 (2014), 1597-1611.
  5. X.-S. Wang, Plancherel–Rotach asymptotics of second-order difference equations with linear coefficients, Journal of Approximation Theory 188 (2014), 1-18.
  6. X.-S. Wang, Asymptotics of delay differential equations via polynomials, Asymptotic Analysis 90 (2014), 83-103.
  7. X.-S. Wang, D. He, J. J. Wylie and H. Huang, Singular perturbation solutions of steady-state Poisson-Nernst-Planck systems, Physical Review E 89 (2014), 022722.
  8. X.-S. Wang, H. Wang and J. Wu, Traveling waves of diffusive predator-prey systems: disease outbreak propagation, Discrete and Continuous Dynamical Systems - Series A 32 (2012), 3303-3324.
  9. X.-S. Wang and R. Wong, Asymptotics of orthogonal polynomials via recurrence relations, Analysis and Applications 10 (2012), 215-235.
  10. X.-S. Wang and J. Wu, Periodic systems of delay differential equations and the dynamics of avian influenza. (Russian) Contemporary Mathematics. Fundamental Directions 45 (2012), 32-42.
  11. X.-S. Wang and J. Wu, Seasonal migration dynamics: periodicity, transition delay and finite-dimensional reduction, Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 468 (2012), 634-650.
  12. X.-S. Wang, J. Wu and Y. Yang, Richards model revisited: validation by and application to infection dynamics, Journal of Theoretical Biology 313 (2012), 12-19.
  13. X.-S. Wang and R. Wong, Global asymptotics of the Meixner polynomials, Asymptotic Analysis 75 (2011), 211-231.
  14. X.-S. Wang and J. Wu, Approximating periodic patterns and dynamic threshold for patchy model of migratory birds with delay, Canadian Applied Mathematics Quarterly 19 (2011), 275-292.
  15. X.-S. Wang and R. Wong, Uniform asymptotics of some q-orthogonal polynomials, Journal of Mathematical Analysis and Applications 364 (2010), 79-87.
  16. X.-S. Wang, Asymptotics of the q-theta function. Communications in Mathematical Analysis 7 (2009), 50-54.
  17. X.-S. Wang and R. Wong, Discrete analogues of Laplace's approximation, Asymptotic Analysis 54 (2007), 165-180.

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