Title: Abstract Algebra. Automorphism groups
Abstract: An automorphism is an isomorphism from a group G to itself. If G is a group, then the collection Aut(G) of automorphisms of G is itself a group (under function composition). The automorphism group of Z/nZ is isomorphic to U(n), the group of units modulo n under multiplication.
This video accompanies page 58 of the class notes (https://www.math.colostate.edu/~adams/teaching/Notes_Math366.pdf) for an "Introduction to Abstract Algebra" class (https://www.math.colostate.edu/~adams/teaching/math366spr2020/)
