Mathologer

Original Title: The most surprising What-Comes-Next? or How did Fibonacci beat the Solitaire army? Fibonacci and a super pretty piece of life-and-death mathematics. What can go wrong?

Today is about reinventing a really cool mathematical wheel and its many different slide rule incarnations, just using a rubber band.

Today's video is about Heron's famous formula and Brahmagupta's and Bretschneider's extensions of this formula and what these formulas have to do with that curious identity 1+2+3=1x2x3.

Calculus made easy, the Mathologer way :)

This video is about number walls a very beautiful corner of mathematics that hardly anybody seems to be aware of. Time for a thorough Mathologerization :) Overall a very natural follow-on to the very popular video on difference tables from a couple of months ago ("Why don't they teach Newton's calculus of 'What comes next?'")

A video on the iconic twisted squares diagram that many math(s) lovers have been familiar with since primary school. Surprisingly, there is a LOT more to this diagram than even expert mathematicians are aware of. And lots of this LOT is really really beautiful and important. A couple of things covered in this video include: Fermat's four squares theorem, Pythagoras for 60- and 120-degree triangles, the four bugs problem done using twisted squares and much more.