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 Editorial Longest increasing subsequences The Scuffed Badminton Problem: Finding the expected time of hitting state (1,n) in a simplified scoring system Approximating the electron cloud wavefunction for s-orbital electrons in Schrödinger's model Modeling Kepler's planetary motion following an elliptical orbit by using an orthographic projection in a right cylinder Using partial differential equations to model the economic productivity and total monetary output of a region Proof without words: Triple-angle formulae for sine and cosine Mathematical formulation of the basic arches structures of Gothic architecture Nyquist-Shannon Sampling Theorem for a wider audience: An intuitive proof sketch without Fourier Many aspects of exponential functions Correcting the Two Envelopes fallacy Into the endless world of elliptic curves Starter packs for geometric constructions Applications of permutation graphs to problem-solving Pearson's median approximation and its limitations Book review: The Mending of Broken Bones Problems 1801-1810 Solutions 1791–1800 64th Annual UNSW School Mathematics Competition: Competition problems and solutions 64th Annual UNSW School Mathematics Competition: Competition winners One-dimensional subdivision rules 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.
