Vector Fields on Spheres and Clifford Algebras
47:04
Group Duality
1:19:35
Geometric Algebra - Duality and the Cross Product
58:39
The fight of the devil of Algebra against the angel of Topology (bigger than) in Algebraic Topology
53:20
Around the Cerny conjecture
39:24
Ravi Vakil: Algebraic geometry and the ongoing unification of mathematics
8:38
Hairy Ball Theorem - Combing a Coconut
1:21:26
Robert O. Keohane & Joseph S. Nye, Jr.: Warren and Anita Manshel Lecture in American Foreign Policy
1:13:45