In mathematics, a non-Desarguesian plane is a projective plane (or sometimes an affine plane) that does not satisfy Desargues' theorem (named after Girard Desargues), or in other words a plane that is not a Desarguesian plane. The theorem of Desargues is true in all projective spaces of dimension not 2; in other words, the only projective spaces of dimension not equal to 2 are the classical projective geometries over a field (or division ring).
In mathematics, a non-Desarguesian plane is a projective plane (or sometimes an affine plane) that does not satisfy Desargues' theorem (named after Girard Desargues), or in other words a plane that is not a Desarguesian plane. The theorem of Desargues is true in all projective spaces of dimension not 2; in other words, the only projective spaces of dimension not equal to 2 are the classical projective geometries over a field (or division ring).
Source: Wikipedia "Non-Desarguesian plane" · CC BY-SA 4.0
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