All subjects
Free, self-contained math courses. Read the chapters or jump straight into practice.
Precalculus
Advanced functions, trigonometry, complex numbers, and…
Algebra
Equations, functions, polynomials, exponents, and the language…
Geometry
Euclidean geometry, proofs, congruence, similarity, circles…
Discrete Mathematics
Logic, sets, proofs, combinatorics, graphs, and number theory…
Calculus
A free university calculus course: limits, derivatives…
Linear Algebra
A free university linear algebra course: systems, matrices…
Probability
A free university probability course: the axioms, conditional…
Statistics
A free university statistics course: describing data, sampling…
Number Theory
The queen of mathematics. From elementary divisibility and…
Combinatorics
The art of counting, arranging, and optimizing discrete…
Set Theory
The foundation of modern mathematics: sets, ordinals…
Mathematical Logic
The foundations of mathematics: logic, proofs, set theory…
Abstract Algebra
Groups, rings, fields, homomorphisms, and an introduction to…
Information Theory
The mathematical study of the quantification, storage, and…
Real Analysis
Rigorous foundations of calculus. Sequences, continuity…