Skip to main content

plus.maths.org

Search articles, podcasts, etc.

Secondary menu

Main navigation

Maths in a minute

Topics and tags

For

Curiosity
Media
Education
Policy

Search articles, podcasts, etc.

Popular topics and tags

Shapes

Geometry
Vectors and matrices
Topology
Networks and graph theory
Fractals

Numbers

Number theory
Arithmetic
Prime numbers
Fermat's last theorem
Cryptography

Computing and information

Quantum computing
Complexity
Information theory
Artificial intelligence and machine learning
Algorithm

Data and probability

Statistics
Probability and uncertainty
Randomness

Abstract structures

Symmetry
Algebra and group theory
Vectors and matrices

Physics

Fluid dynamics
Quantum physics
General relativity, gravity and black holes
Entropy and thermodynamics
String theory and quantum gravity

Arts, humanities and sport

History and philosophy of mathematics
Art and Music
Language
Sport

Logic, proof and strategy

Logic
Proof
Game theory

Calculus and analysis

Differential equations
Calculus

Towards applications

Mathematical modelling
Dynamical systems and Chaos

Applications

Medicine and health
Epidemiology
Biology
Economics and finance
Engineering and architecture
Weather forecasting
Climate change

Understanding of mathematics

Public understanding of mathematics
Education

Get your maths quickly

Maths in a minute

Search articles, podcasts, etc.

Main menu

Maths in a minute

Topics and tags

Audiences

Curiosity
Media
Education
Policy

Secondary menu

Content about “Cauchy sequence”

Article

The real numbers and Cauchy sequences

We take the real numbers for granted, but what are they really?

Displaying 1 - 1 of 1

Plus is part of the family of activities in the Millennium Mathematics Project.
Copyright © 1997 - 2026. University of Cambridge. All rights reserved.