# Dimensions

Dimensions

Dimensions is a French project that makes educational movies about mathematics, focusing on spacial geometry. It uses POV-Ray to render some of the animations, and the films are release under a Creative Commons licence.

The film is separated in nine chapters, which follow this plot:

* Chapter 1: Dimension two explains Earth's coordinate system, and introduces the stereographic projection.
* Chapter 2: Dimension three discusses how two-dimensional beings would imagine three-dimensional objects.
* Chapters 3 and 4: The fourth dimension talk about four-dimensional polytopes ("polychora"), projecting the regular ones stereographically on the three-dimentional space.
* Chapters 5 and 6: Complex numbers are about the square root of negative numbers, transformations, and fractals.
* Chapters 7 and 8: Fibration show what a fibration is. Complex numbers are used again, and there are circles and tori rotating and being transformed.
* Chapter 9: Proof emphasizes the importance of proofs in mathematics, and proves the circle-conservationess of the stereographic projection as an example.

The project's website is [http://www.dimensions-math.org/ http://www.dimensions-math.org/] .

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