Lots of information about Egyptian fractions collected by David Eppstein.
The page establishes that the conjecture is true for all integers. Tables and software by Allan Swe...
Definition of the problem and a list of special cases that have been solved, by Clemens Heuberger.
Statement of the problem in several languages, history of the problem, bibliography and links to re...
Given a Diophantine equation with any number of unknowns and with rational integer coefficients: de...
Dario Alpern's Java/JavaScript code that solves Diophantine equations of the form Ax^2 + Bxy + Cy^2...
Sets with the property that the product of any two distinct elements is one less than a square. Not...
Triangles in the Euclidean plane such that all three sides are rational. With tables of Heronian an...
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.