Elliptic geometry

Rarity: Uncommon

A topic a little better known than average, read and translated beyond its own country.

Rarity follows how well known the article is: its views on the French and English Wikipedia over a year, and the number of languages it exists in.

At a glance

Class

Notion

Domain

Science and technology

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What Wikipedia says

Elliptic geometry is an example of a geometry in which Euclid's parallel postulate does not hold. Instead, as in spherical geometry, there are no parallel lines since any two lines must intersect. However, unlike in spherical geometry, two lines are usually assumed to intersect at a single point (rather than two).

Excerpt from the Wikipedia article “Elliptic geometry”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Ske at French Wikipedia, CC BY-SA 3.0, via Wikimedia Commons.