Set Theory and Logic

Problems And Solutions In Mathematical Olympiad (Secondary 1)

Naive Set Theory

A Concise Introduction to Pure Mathematics: Edition 4

Universal Algebra: Fundamentals and Selected Topics

Elements of Set Theory

A Beginner's Further Guide To Mathematical Logic

The Incompleteness Phenomenon

Journey to the Edge of Reason: The Life of Kurt Gödel

The Art of Proving Binomial Identities

Set Theory: The Structure of Arithmetic

Forcing For Mathematicians

Pythagorean Fuzzy Sets: Theory and Applications

Axiomatic Set Theory

Introduction to Math Olympiad Problems

Mechanical Logic in Three-Dimensional Space