Missing Knowls - Imported Knowlpedia Content

The following knowl IDs are referenced in files within content/algebra-groups/ but do not yet exist. They should be created to complete the linking.

Ring/Module Theory (needed for number theory connections)

group-of-units - Referenced in:
fermats-little-theorem.md - $(\mathbb{Z}/p\mathbb{Z})^\times$
automorphism-group-cyclic.md - $(\mathbb{Z}/n\mathbb{Z})^\times$
eulers-theorem.md - $(\mathbb{Z}/n\mathbb{Z})^\times$

Representation Theory

character - Referenced in:
class-function.md - character of a finite-dimensional complex representation
burnsides-pq-theorem.md - characters of finite groups

group-representation - Referenced in:
burnsides-pq-theorem.md - representation theory

Module Theory

krull-schmidt-azumaya-theorem - Referenced in:
krull-remak-schmidt-theorem-groups.md - Krull-Schmidt-Azumaya for modules