Proofs Without Words

Published by patrick honner on

This is a great collection of favorite Proofs Without Words from the community at

MathOverflow is geared toward research-level mathematics, so many of the examples deal with very advanced ideas.  However, there are some lovely and accessible proofs of the sum of the first n squares, the sum of the first n cubes,  the AM-GM inequality, and various Fibonacci identities.

And since it’s MathOverflow, the comments include a healthy debate about whether you can actually prove something with only a diagram!

Categories: Resources

patrick honner

Math teacher in Brooklyn, New York


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