# Electromagnetism as a $U(1)$-gauge theory

I would like to learn gauge theory, starting from the simplest case. I have heard that I should start with electromagnetism, which is just the $$U(1)$$-gauge theory. All the references I know are written for physics students.

Being familiar with bundle theory, it would be nice if I can start with a short exposition that explains electromagnetism using the language of bundles, characteristic classes, curvatures, etc.. . Any relevant pointers are appreciated.

• I like the lecture notes by José Figueroa-O'Farrill empg.maths.ed.ac.uk/Activities/GT – Appliqué Oct 9 '19 at 13:28
• It seems to be useful! I will grok the first 5 lectures soon. – Student Oct 9 '19 at 14:54