PHN0eWxlPgouZnVzaW9uLWNvbnRlbnQtYm94ZXMgLmZ1c2lvbi1jb2x1bW4gewoJbWFyZ2luLWJvdHRvbTogMHB4Owp9Cjwvc3R5bGU+ Faculty of Science and Technology (FST) at the University of Macau hosted a distinguished lecture by Prof. Ivar I. Ekeland, world-renowned mathematician and originator of Ekeland’s Variational Principle, on 19 November 2025. The event drew a full house of faculty, researchers, and students for his talk titled “From the Variational Principle to the Inverse Function Theorem.” In his presentation, Prof. Ekeland demonstrated how his variational principle can be used to derive a powerful generalization of the inverse function theorem—even in settings where traditional differentiability fails. He covered both classical Banach space cases and the more intricate Nash-Moser scenario, highlighting applications in nonlinear analysis and partial differential equations. A Fellow of the Royal Society of Canada and member of several ...