WISKUNDE links
- Number Theory
- Keith Conrad, Pell's equation I
- Keith Conrad, Pell's equation II
- Keith Conrad, Negation and inversion of continued fractions
- Keith Conrad, The congruent number problem
- Keith Conrad, Factoring in Quadratic Fields
- N.C. Ankeny, Sums Of Three Squares
- A.F. Beardon, Sums of Powers of Integers
- Z.I. Borevich and I.R. Shafarevich Number Theory (1966)
- Wikipedia Periodic continued fraction
- Pankaj Kumar Sharma Pell's Equation
- Binary Quadratic Forms
- Hendrik W. Lenstra, Jr, Solving the Pell equation
- Ronald van Luijk, An Elliptic K3 surface associated to Heron triangles
- Kimball Martin, The Pell equation
- L.M. Hugenholz, De geschiedenis van de vergelijking van Pell
- L'ubomíra Balková, Aranka Hrusková, Continued Fractions of Quadratic Numbers
- Souad I. Mugassabi and Fatima F. Abdullah, The Addition and Subtraction Operations for two Continued Fractions
- P.J. Rippon and H. Taylor, Even and Odd Periods in Continued Fractions of Square Roots.
- Francesca Aicardi, The continued fractions of the square roots of integers: on the parity of the length of their period
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- David Loeffler, Elliptic Curves
- Paul Yiu, Heron triangles which cannot be decomposed into two integer right triangles
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- NUMBERS APLENTY, interesting natural numbers and their properties
- M.C.van Hoorn, Cryptologie en de Riemann-hypothese
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- (Finite) Geometry
- Wikipedia, Regular polytope
- Wikipedia, Fano plane
- S.E.Payne and J.A. Thas, Finite Generalized Quadrangles
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- TUE (bouwkunde), (Chapter 3) Quadratic curves, quadratic surfaces
- Pauline Ruegg-Reymond, Classification of Quadratic Surfaces
- Wolfgang Ziller, Quadric surfaces
- Chris van Tienhoven, Encyclopedia of Quadri-Figures (EQF)
- Dick Klingens, Kwadreerbare maantjes
- Peter J. Cameron, Regular polytopes
- Nan Star Polytopes, Regular star polytopes
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- Basics
- Books
- Finite Geometry
- Diversen
- Universiteit Leiden, Science faculty.
- NGL, Natuurwetenschappelijk Gezelschap Leiden
- Robin J. Wilson, Introduction to Graph Theory, Fourth Edition, Longman
- Hanneke Paulssen, Lineaire Algebra en Vector Analyse. 11. Toepassingen vectorrekening, gradiënt, divergentie, rotatie. Universiteit Utrecht
- J. Malkevitch, Finite Geometries?, AMS
- n-Cube
- N.G. de Bruijn Set!
- J.P. Hogendijk, Kegelsneden in de Grieks oudheid
- N.J. Wildberger, Rational Trigonometry Site
- MATH+ Advent Calendar