Mathematics FAQs


What Is a Tensor?

Let me start with a counter-question. What is a number? Before…

Why Do People Say That 1 And .999 Are Equal?

Why do people say 1 and 0.999... are equal? Aren't they two different…

What Proofs are in Mathematics and Why Bother?

This FAQ is about proofs. Proofs are central to mathematics,…

The History and Concept of the Number 0

The goal of this FAQ is to clear up the concept of 0 and specifically…