Series An Amazing Formula Generalizing Leibniz' formula for π, the alternating harmonic series, and the Basel problem

Geometry Visualizing Mathematical Equations and Operations Capture the Essence of an Equation and Solve it Visually by Using Mathematical Graphs

Proof Theory A Simple Proof of the Quadratic Formula Using Symmetry You Don’t Need to Remember the Formula

Complex Analysis The Beautiful World of Complex Functions Exploring Hidden Structure in Higher Dimensions

Euler Infinity in Numbers — Leonhard Euler This is a story about one of the greatest minds in history, and about the mysteries and beauty surrounding his legacy. The story is about Leonhard Euler (1707–1783).