User:Fjackson

I am a mathematics graduate from Bristol University (1967) and a retired Systems Engineer (2009). My mathematical interest is primarily Euclidean geometry in 2D, 3D and higher dimensions. I have contributed to MathWorld entries and OEIS entries and published in Forum Geometricorum. Other publications can be found at ResearchGate. I have made some contribution to the following articles within Wikipedia:


 * Automedian triangle
 * Chebyshev function
 * Complete sequence
 * Conway triangle notation
 * Cyclic quadrilateral
 * Euclidean distance
 * Ex-tangential quadrilateral
 * GEOS circle
 * Generalized continued fraction
 * Golden ratio
 * Heronian triangle
 * Incircle and excircles of a triangle
 * Integer triangle
 * Johnson circles
 * Mersenne prime
 * Nine-point circle
 * Octahedron
 * Orthocentric system
 * Pascal's simplex
 * Poncelet point
 * Practical number
 * Prime-counting function
 * Pythagorean quadruple
 * Pythagorean triple
 * Quadrilateral
 * Simson line
 * Solid angle
 * Special right triangles
 * Tangential quadrilateral
 * Tetrahedron
 * Triangle inequality
 * Trilinear coordinates
 * Ulam number

Sub Pages

 * /workinprogress