# Directory of Diophantine Equations Resources

In this category are included any equation or set of equations where the unknowns must be integer numbers. It includes Fermat Last Theorem as a special case.

## Resources in This Category

• #### Bibliography on Hilbert's Tenth Problem

http://liinwww.ira.uka.de/bibliography/Math/Hilbert10.html
Searchable, 400 items.

• #### Diagonal Quartic Surfaces

http://www.boojum.org.uk/maths/quartic-surfaces/
Articles, computations and software in Magma and GP by Martin Bright.

• #### Diophantine m-tuples

http://www.math.hr/~duje/dtuples.html
Sets with the property that the product of any two distinct elements is one less than a square. Notes and bibliography by Andrej Dujella.

• #### Egyptian Fractions

http://www.ics.uci.edu/~eppstein/numth/egypt/
Lots of information about Egyptian fractions collected by David Eppstein.

• #### Hilbert's Tenth Problem

http://logic.pdmi.ras.ru/Hilbert10/
Statement of the problem in several languages, history of the problem, bibliography and links to related WWW sites.

• #### Hilbert's Tenth Problem

http://www.ltn.lv/~podnieks/gt4.html
Given a Diophantine equation with any number of unknowns and with rational integer coefficients: devise a process, which could determine by a finite number of operations whether the equation is solvable in rational integers.

• #### Linear Diophantine Equations

http://www.thoralf.uwaterloo.ca/htdocs/linear.html
A web tool for solving Diophantine equations of the form ax + by = c.

• #### Pell's Equation

http://www-history.mcs.st-andrews.ac.uk/history/Projects/Pearce/Chapters/Ch8_6.html
Provides information on this equation, solved by Brahmagupta in 628 AD.

• #### Pell's Equation

http://sweet.ua.pt/tos/pell.html
Record solutions.

• #### Pythagorean Triples in JAVA

http://www.hbnweb.de/pythagoras/pythagoras.html
A JavaScript applet which reads a and gives integer solutions of a^2+b^2 = c^2.

• #### Pythagorean Triplets

http://www.hbmeyer.de/pythagen.htm
A Javascript calculator for pythagorean triplets.

• #### Quadratic Diophantine Equation Solver

Dario Alpern's Java/JavaScript code that solves Diophantine equations of the form Ax^2 + Bxy + Cy^2 + Dx + Ey + F = 0 in two selectable modes: "solution only" and "step by step" (or "teach") mode. There is also a link to his description of the solving methods.

• #### Rational and Integral Points on Higher-dimensional Varieties

http://aimath.org/WWN/qptsurface2/
Some of conjectures and open problems, compiled at AIM.

• #### Rational Triangles

http://grail.cba.csuohio.edu/~somos/rattri.html
Triangles in the Euclidean plane such that all three sides are rational. With tables of Heronian and Pythagorean triples.

• #### The Erdos-Strauss Conjecture

http://math.uindy.edu/swett/esc.htm
The page establishes that the conjecture is true for all integers. Tables and software by Allan Swett.

• #### Thue Equations

http://finanz.math.tu-graz.ac.at/~cheub/thue.html
Definition of the problem and a list of special cases that have been solved, by Clemens Heuberger.

## Other Languages

Thanks to DMOZ, which built a great web directory for nearly two decades and freely shared it with the web. About us