Origin of non-Euclidean
Examples from the Web for non-euclidean
For instance, we might know that in non-Euclidean geometries, parallels meet.The Civilization of Illiteracy|Mihai Nadin
Beltrami's mathematical investigations were devoted mainly to the non-Euclidean geometry.
Lobachevski has proved not, by creating non-Euclidean geometry.
The real basis of the non-Euclidean geometry is dimension as direction.
But it is not enough that the Euclidean (or non-Euclidean) geometry can never be directly contradicted by experience.