Geometric unity by Eric Weinstein in 2013
Lecture
Theories
Dirac matter
- Most fundamental of all elliptic operators in Euclidean signature generating Atiyah-Singer theory
GR
- Unique spin-2 massless field capable of communicating gravity
YMMAH
- Normed square of the curvature and saying whatever the field strength is lets measure that size
Intrinsic and auxiliary
Intrinsic
- Physics: GR
- Math: (semi)-Riemannian geometry
Auxiliary
- Physics: YM
- Math: fiber bundle or modern gauge theory