Can we exponentiate d/dx? Vector (fields)? What is exp? | Lie groups, algebras, brackets #4
22:44
Matrix trace isn't just summing the diagonal | Lie groups, algebras, brackets #5
21:57
What is Lie theory? Here is the big picture. | Lie groups, algebras, brackets #3
23:22
What *is* a photon?
51:16
Why can't you multiply vectors?
44:31
Lie algebras visualized: why are they defined like that? Why Jacobi identity?
15:05
Math's greatest Lie!!
45:24
Why you can't solve quintic equations (Galois theory approach) #SoME2
16:26