A classic Pythagorean triple, 5-12-13. Just 5 and 12 are regular numbers, compared to 13, which is not regular.

The Plimpton 322 clay tablet, with numbers written in cuneiform script. The Babylonian-era tablet lists Pythagorean triples. (CN) — A 3,700-year-old clay tablet contains a curious list of Pythagorean ...

We present a parametrization for the Pythagorean matrices, i.e., integer-valued matrices A, B, and C such that A² + B² = C². Journal Information The Monthly publishes articles, as well as notes and ...

Pythagorean triples are special cases of Pythagoras’s theorem. They are sets of whole numbers that correspond to the lengths of the sides of particular right-angled triangles. Three, four and ...

The Pythagorean Theorem: A 4,000-Year History Eli Maor. Princeton University Press, $24.95 (259pp) ISBN 978-0-691-12526-8 ...