Fiber Bundles
Understand fiber bundles well enough to reread Landau & Lifshitz Vol. 2 and see electromagnetism as what it secretly is - a connection on a U(1) principal bundle.
Learning
Understand fiber bundles well enough to reread Landau & Lifshitz Vol. 2 and see electromagnetism as what it secretly is - a connection on a U(1) principal bundle.