Einstein was born, Hawking passes away and it’s Pi day… What is Pi? Understanding pi is as easy as counting to one, two, 3.1415926535… OK, we'll be here for a while if we keep that up. Here's what's important: Pi... Continue Reading →

For a cyclic quadrilateral, the sum of the products of the two pairs of opposite sides equals the product of the diagonals. We have three colored segment in this animation. Surprisingly the length of the longest one is always the sum... Continue Reading →

In numerical analysis, Newton's method (also known as the Newton–Raphson method), named after Isaac Newton and Joseph Raphson, is a method for finding successively better approximations to the roots (or zeroes) of a real-valued function. The idea of the method is as follows: one starts with an initial guess which is... Continue Reading →

In geometry, an envelope of a family of curves in the plane is a curve that is tangent to each member of the family at some point, and these points of tangency together form the whole envelope. Classically, a point on the envelope can be thought of as the... Continue Reading →