Modular arithmetic

Modular arithmetic is a special type of arithmetic that involves only integers. Since modular arithmetic is such a broadly useful tool in number theory, we divide its explanations into several levels:

• Introductory modular arithmetic
• Intermediate modular arithmetic
• Olympiad modular arithmetic

Resources

Introductory Resources

Books

• The AoPS Introduction to Number Theory by Mathew Crawford.

Classes

• AoPS Introduction to Number Theory Course

Intermediate Resources

• Number Theory Problems and Notes by Naoki Sato.

Olympiad Resources

• Number Theory Problems and Notes by Naoki Sato.