Faculty Member
--------------------------------------------------------
Recent research
A New Differential Form And 6-Shere
https://hal.science/hal-05060123v2/document
We construct a new differential form from arbitrary almost complex structures on smooth manifolds. As an application of this differential form we prove that 6-Sphere does not have complex structure. A preprint of these advances was completed on January 29, 2025, and submitted on January 31, 2025. A shorter version of the proof is available online as a preprint:
https://hal.science/hal-05027695v2/document
The question of whether the above 6-dimensional sphere is a complex manifold is generally called the Hopf problem. For discussions on the Hopf problem up to 2017, please refer to:
I. Agricola, G. Bazzoni, and O. Goertsches, On the history of the Hopf problem,, Differential Geometry and its Applications, 57(2018), 1--9.
There is also a series of in-depth discussions on the Hopf problem on MathOverFlow??
Is there a complex structure on the 6-sphere?
https://mathoverflow.net/questions/1973/is-there-a-complex-structure-on-the-6-sphere
Atiyah's May 2018 paper on the 6-sphere
https://mathoverflow.net/questions/304071/atiyahs-may-2018-paper-on-the-6-sphere
......
--------------------------------------------------------
Ph.D. in Mathematics
University at Buffalo, The State University of New York (SUNY)
Member, Mathematical Sciences Research Institute (MSRI)
Berkeley, California, Feb 2007 - May 2007
Visiting Fellow, Department of Mathematics
Princeton University, Aug 2022 - Jan 2023
Visiting Professor, Department of Mathematics
Cornell University, Jan 2023 - Jun 2023
https://math.cornell.edu/jun-michael-ling
Teaching
Cornell University
MATH 2130 Calculus III, Spring 2023
https://classes.cornell.edu/browse/roster/SP23/class/MATH/2130
Advanced Calculus I, Fall 2025
Calculus III, Fall 2025
Calculus III, Fall 2025
Trigonometry, Fall 2025
Trigonometry, Fall 2025
Ordinary Differential Equations, Summer 2025
Advanced Calculus II, Spring 2025
Calculus I QL, Spring 2025
Calculus II, Spring 2025
Linear Algebra, Spring 2025