A walk through mathematics!

Nine chapters, two hours of maths, that take you gradually up to the fourth dimension. Mathematical vertigo guaranteed!

Chapter 1: Dimension two

Hipparchus explains how two numbers can describe the position of a point on a sphere. He then explains stereographic projection: how can one draw a picture of the Earth on a piece of paper? These lessons will come in very handy for exploring the third dimension...and then the fourth!

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