Fixed points, orbits, and stabilizers

Explores subsets and subgroups related to group actions on sets.

Explores defining functors on morphisms, fixed points, orbits, equivariance, and composition preservation.

Explores group actions on sets, orbits, fixed points, and classic results.

Explores examples of group actions on sets, emphasizing the utility of group actions to understand groups.

Explores group actions on varieties, including orbits, stabilizers, and G-invariant morphisms.