Fibre products and Galois covers
24:27
Grothendieck topologies
18:05
What are the Weil conjectures about?
51:49
The joy of abstract mathematical thinking - with Eugenia Cheng
16:47
Jimmy Kimmel Reacts to Donald Trump’s Inauguration
18:08
Etale cover - open cover analogy
32:34
Prelude to Galois Theory: Exploring Symmetric Polynomials
23:40
Galois theory: Splitting fields
9:21