A brief history of Geometry III: The 19th century | Sociology and Pure Mathematics | N J Wildberger

The 19th century was a pivotal time in the development of modern geometry, actually a golden age for the subject, which then saw a precipitous decline in the 20th century. Why was that?

To find out, let's first overview some of the main developments in geometry during the 1800's, including Inversive Geometry, Projective Geometry, Non-Euclidean Geometry and Complex Geometry.

This overview is necessarily simplified so it is suitable for a non-mathematical audience.

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