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What is a Proof?

What is a Proof?

Author: Leland Schipper
Description:

Build a basic understanding of the purpose and role of proofs in mathematics.

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Tutorial

How to Prove a Mathematical Theory

Euclid of Alexandria revolutionized the way that mathematics is written, presented or thought about, and introduced the concept of mathematical proofs. Discover what it takes to move from a loose theory or idea to a universally convincing proof.

Source: Lesson by Scott Kennedy, animation by Karrot Animation

Funny Proof that Girls = Evil

Check out this humorous example of a "mathematical proof". It is obviously just a joke, but it demonstrates how a proof is just a set of logical organized statements that demonstrate the truth of a new statement.

Source: AmazingMathGuy