GSoC 2023: Dynamical semigroups

[MatheMagicianPi]

This is a tracker for the GSoC project on dynamical semigroups.

This project implements dynamical semigroups, which are finitely generated subsemigroups of the endomorphism ring of a subscheme of projective or affine space.

Mentors: @EnderWannabe @bhutz

List of pull requests:

• Initial implementation of dynamical semigroups #35947
• Implemented five new operations for dynamical semigroups #35988
• Implemented two new methods for dynamical semigroups #36041
• Fixed two linter errors for dynamical semigroups #36150