A JavaScript applet which reads a and gives integer solutions of a^2+b^2 = c^2.
Sets with the property that the product of any two distinct elements is one less than a square. Notes and bibliography by Andrej Dujella.
Triangles in the Euclidean plane such that all three sides are rational. With tables of Heronian and Pythagorean triples.
John Robertson's treatise on how to solve Diophantine equations of the form x^2 - dy^2 = N.
Record solutions.
On-line Pell Equation solver by Michael Zuker.
Some of conjectures and open problems, compiled at AIM.
Articles, computations and software in Magma and GP by Martin Bright.
A web tool for solving Diophantine equations of the form ax + by = c.
A web text by Fred Barnes on 60-, 90-, and 120-degree integer-sided triangles.
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