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Featured Contributor
Oliver Seipel
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ABOUT ME:
STAFF PICKS:
- Brouncker's continued fraction of Wallis's Arithmetica Infinitorum and Euler E123
- Continued fraction solution for an infinite series-parallel-resistors-connection
- Euler E593 transformation of series into continued fractions
- A generalized continued fraction for Eulergamma with intriguing pattern
- Skilling's 1975 Great Disnub Dirhombidodecahedron
- Riemann's explicit formula made more explicit
- An elegant recurrence relation for Zeta(2n), Euler E130
- A hard integral to solve part two
- A hard integral to solve part one
- Solving a depressed cubic with Scipione del Ferro's idea
- Centered Hexagonal, Centered Triangular, Triangular and Pentagonal Numbers
- Ramanujan-Hardy approximation and how MacMahon computed P(200)
- Great Snub Icosidodecahedron U57
- Integration by parts for rookies
- François Morellet: geometrical abstract art
- Sol LeWitt conceptual art
- Edmund Hess 1876: five cube compound in an additive way
- Dodecahedron small triambic icosahedron compound
- Constant angle between the hour and minute hands on an analog clock
- The Forsyth-Edwards-Notation (FEN) with Chess Alpha font
- The compound of ten tetrahedra
- Generalization of the Galilei- and Lorentz-transformations
- Summation over the roots of the Zeta function in the critical strip
- Computational exploration of Ramanujan primes
- Finite group presentation
- Platonic and Archimedean dual compounds
- Radiation laws in every dimension (Stefan-Boltzmann, Planck, Wien)
- Projection of a hypercube into three dimensional space
- Black and white graphics with Polygon
- Bürgi's Artificium in his Fundamentum Astronomiae 1587
- Stifel's odd magic squares of any size (Arithmetica Integra 1544)
- 880 magic squares of order 4 by Frenicle and Fitting
- Michael Stifel's Arithmetica Integra (1544) multiplicative magic square