Parabola Published since 1964, Parabola is now an online Diamond Open Access journal (ISSN 1446-9723) for and by students and anyone else who enjoys maths. Get the latest Current issue Most popular Extension III trailer Editorial Numerically computed double and triple bubbles in R^3 for density r^p Exploding dice combinatorics Constant-recursive equations and polynomial equations Analysis of amicable numbers and their abundancy index: patterns, bounds and implications A historical introduction to the Riemann Hypothesis Matrices with integer eigenvalues for all permutations of coefficients (thanks to Pythagoras!) Many aspects of probability theory Extending factorials to the gamma function Batting risk-reward batting tradeoffs in cricket Quadratic Triangles Exploring digit products Trigonometric ratios can prove the Pythagorean Theorem Problems 1781–1790 Solutions 1771–1780 63rd Annual UNSW School Mathematics Competition: Competition problems and solutions 63rd Annual UNSW School Mathematics Competition: Competition winners View current issue Problems 1731–1740 An elementary proof that the regular polygon is the largest among polygons that are inscribed in a circle Constructing a model of an amplifier How to derive the quadratic formula Back to Babylonian roots View all issues Issues Read every issue and article on a diverse range of mathematical topics. About us Learn all about Parabola's history and journal scope since 1964. Contribute Get all information on how to submit an article to Parabola.
