Information includes the author's biography, original source, and a graph on the distribution of publication dates.

Contains downloadable programs and data. Also shows the implementation of the various algorithms.

Features a set of four positive rationals, with their properties. Includes various generalizations and references.

Presents a table of values having a link to a larger table and related comments. Includes links to software source code.

Promotes research connected with the negative solution of Hilbert's Tenth Problem. Also contains galleries, history, and a bibliography.

Provides history of the problem and story of the solution. With examples and solutions to sample problems.

Shows other methods in computing fundamental solution. Includes a table depicting a current complete list of record holders.

Features some conjectures and open problems concerning rational and integral points on higher dimensional varieties. With photos and lecture notes.

Provides definition, a discussion on the kinds of triangles, related links, and tables.