Groupoids and skeletons of monoids and preorders
Exercises in category theory: groupoids and skeletons
Mathematics Research Blog
Articles on category theory, universal algebra, topology, and the cultures around mathematics.
Exercises in category theory
Series of posts containing short answers to exercises in category theory from my honours year at the University of Cape Town
Is the Double Twisted Möbius Strip Isotopic to the Strip?
Solving a problem given in Tadashi Tokieda's Topology and Geometry course on YouTube