Here are some of my notes on special topics. They summarise other peoples' books or course notes on a given topic, and are mostly meant as reminder notes rather than as an introduction. Do feel free to use them, but please include the original sources in any attribution.

Sooner or later these will be notes on set theory and logic, but right now sadly the title is only half true, because I haven't typed up the "logic" part yet. Currently these notes are a quick ~10 pages covering the following:

Some initial set theory definitions

Operations on sets

Intro to the algebra of sets

Set relations

Defining ordered n-tuples as sets

Equivalence relations and equivalence classes

Set theoretic definition of functions

Function properties and related definitions

Partial, simple, and well orderings, and isomorphisms