# What is true about Euclidean and projective transformations?

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## What do projective transformations preserve?

A projective transformation preserves incidence. points and three concurrent lines are mapped to three concurrent lines. The latter might involve the case that the point of intersection is mapped to a point at infinity. Because of the incidence preservation, projective transformations are also called collineations.

## What is meant by Euclidean space?

Euclidean space, In geometry, a two- or three-dimensional space in which the axioms and postulates of Euclidean geometry apply; also, a space in any finite number of dimensions, in which points are designated by coordinates (one for each dimension) and the distance between two points is given by a distance formula.

## What is fundamental theorem of projective geometry?

The fundamental theorem of projective geometry says that an abstract automorphism of the set of lines in Kn which preserves “incidence relations” must have a simple algebraic form.

## How is projective geometry used in art?

Projective geometry is a field of mathematics which deals which the relationship between the mappings and projections of real life three dimensional objects on to a two dimensional plane or paper. … This branch of geometry has been vastly used in painting, drawings and other art forms for hundreds of years.

## Is translation a projective transformation?

Although a translation is a non-linear transformation in a 2-D or 3-D Euclidean space described by Cartesian coordinates (i.e. it can’t be combined with other transformations while preserving commutativity and other properties), it becomes, in a 3-D or 4-D projective space described by homogeneous coordinates, a simple …

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