Ivar Ekeland

Professor of Mathematics, CEREMADE, UniversitƩ Paris-Dauphine
Scientific, Seminar
DG-MP-PDE Seminar: Ivar Ekeland (UBC)
November 9, 2010
University of British Columbia
I state and prove an inverse function theorem between Fr\'{e}chet spaces, which does not require that the function to be inverted is C^{2}, or even C^{1}, or even Fr\'{e}chet-differentiable.
Scientific, Distinguished Lecture
Mathematics and the Planet Earth: a Long Life Together I
July 15, 2013
University of British Columbia
When Colombus left Spain in 1492, sailing West, he knew that the Earth was round and was expecting to land in Japan. Seventeen centuries earlier, around 200 BC, Eratosthenes had shown that its circumference was 40,000 km, just by a smart use of...
Scientific, Distinguished Lecture
Mathematics and the Planet Earth: a Long Life Together II
July 17, 2013
University of British Columbia
When Colombus left Spain in 1492, sailing West, he knew that the Earth was round and was expecting to land in Japan. Seventeen centuries earlier, around 200 BC, Eratosthenes had shown that its circumference was 40,000 km, just by a smart use of...