| Directory > Science > Math > Number Theory > Diophantine Equations Linear Diophantine Equations
A web tool for solving Diophantine equations of the form ax + by = c.
http://thoralf2.uwaterloo.ca/htdocs/linear.html
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Bibliography on Hilbert's Tenth Problem
Searchable, ~400 items.
http://liinwww.ira.uka.de/bibliography/Math/Hilbert10.html
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Diophantine Equations
Dave Rusin's guide to Diophantine equations.
http://www.math.niu.edu/~rusin/papers/known-math/index/11DXX.html
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Egyptian Fractions
Lots of information about Egyptian fractions collected by David Eppstein.
http://www.ics.uci.edu/~eppstein/numth/egypt/
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The Erdos-Strauss Conjecture
The conjecture states that for any integer n > 1 there are integers a, b, and c with 4/n = 1/a +
1/b + 1/c, a > 0, b > 0, c > 0. The page establishes that the conjecture is true for all
integers n, 1 < n <= 10^14. Tables and software by Allan Swett.
http://math.uindy.edu/swett/esc.htm
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Developing A General 2nd Degree Diophantine Equation x^2 + p = 2^n
Methods to solve these equations.
http://www.biochem.okstate.edu/OAS/OJAS/thiendo.htm
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Thue Equations
Definition of the problem and a list of special cases that have been solved, by Clemens Heuberger.
http://finanz.math.tu-graz.ac.at/~cheub/thue.html
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Hilbert's Tenth Problem
Statement of the problem in several languages, history of the problem, bibliography and links to
related WWW sites.
http://logic.pdmi.ras.ru/Hilbert10/
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Diophantine Geometry in Characteristic p
A survey by José Felipe Voloch.
http://www.ma.utexas.edu/users/voloch/surveylatex/surveylatex.html
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Pythagorean Triplets
A Javascript calculator for pythagorean triplets.
http://www.faust.fr.bw.schule.de/mhb/pythagen.htm
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Hilbert's Tenth Problem
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.
http://www.ltn.lv/~podnieks/gt4.html
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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.
http://www.alpertron.com.ar/QUAD.HTM
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Pythagorean Triples in JAVA
A JavaScript applet which reads a and gives integer solutions of a^2+b^2 = c^2.
http://home.foni.net/~heinzbecker/pythagoras.html
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Diophantine m-tuples
Sets with the property that the product of any two distinct elements is one less than a square.
Notes and bibliography by Andrej Dujella.
http://www.math.hr/~duje/dtuples.html
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Rational Triangles
Triangles in the Euclidean plane such that all three sides are rational. With tables of Heronian
and Pythagorean triples.
http://grail.cba.csuohio.edu/~somos/rattri.html
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On the Psixyology of Diophantine Equations
PhD thesis, Pieter Moree, Leiden, 1993.
http://web.inter.NL.net/hcc/J.Moree/linkind2.htm
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Solving General Pell Equations
John Robertson's treatise on how to solve Diophantine equations of the form x^2 - dy^2 = N.
http://hometown.aol.com/jpr2718/pelleqns.html
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Pell's Equation
Record solutions.
http://www.ieeta.pt/~tos/pell.html
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Fermat's Method of Infinite Descent
Notes by Jamie Bailey and Brian Oberg. Illustrates the method on FLT with exponent 4.
http://sweb.uky.edu/~jrbail01/fermat.htm
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Diophantus Quadraticus
On-line Pell Equation solver by Michael Zuker.
http://www.bioinfo.rpi.edu/~zukerm/cgi-bin/dq.html
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Rational and Integral Points on Higher-dimensional Varieties
Some of conjectures and open problems, compiled at AIM.
http://aimath.org/WWN/qptsurface2/
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1, 3, 8, 120, ...
Sets of numbers such that the product of any two is one less than a square. Diophantus found the
rational set 1/16, 33/16, 17/4, 105/16; Fermat the integer set 1, 3, 8, 120.
http://www.weburbia.demon.co.uk/pg/diophant.htm
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