projective geometry

American  

noun

1. the geometric study of projective properties.

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projective geometry British  

noun

1. the branch of geometry concerned with the properties of solids that are invariant under projection and section

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Etymology

Origin of projective geometry

First recorded in 1880–85

Example Sentences

The first development—projective geometry—was born in the turmoil of war.

From Literature

But Gergonne would surely have approved: he studied projective geometry, which involves shapes with exotic topologies, such as surfaces that have only one side.

From Nature

In projective geometry any two straight lines in a plane intersect, and the straight lines are closed series which return into themselves, like the circumference of a circle.

From Project Gutenberg

And this is true even of such apparently essentially intuitional fields as projective geometry, where entities can be substituted for directional lines and the axioms be turned into relational postulates governing their configurations.

From Project Gutenberg

The author is professor of projective geometry and geometric drawing in the University of Bologna, and is one of the most conspicuous of contemporary Italian scientists.

From Project Gutenberg