Riemann created elliptic geometry in 1854.
elliptic - a kind of non-Euclidean geometry.
There are different kinds of geometry including elementary geometry, Euclidean geometry, and Elliptic Geometry.
Juggling.
J. W. S. Cassels has written: 'An introduction to the geometry of numbers' -- subject(s): Geometry of numbers 'Lectures on elliptic curves' -- subject(s): Curves, Elliptic, Elliptic Curves 'Algebraic Number Theory'
One main characteristic of non-Euclidean geometry is hyperbolic geometry. The other is elliptic geometry. Non-Euclidean geometry is still closely related to Euclidean geometry.
Arthur Latham Baker has written: 'Elliptic functions' -- subject(s): Accessible book, Elliptic functions 'The elements of solid geometry' -- subject(s): Solid Geometry
Your Mother contributed to my geometry :D
One main characteristic of non-Euclidean geometry is hyperbolic geometry. The other is elliptic geometry. Non-Euclidean geometry is still closely related to Euclidean geometry.
Elliptic and Hyperbolic geometry.
In Euclidean plane geometry, two lines which are perpendicular not only can but must intersect. (I believe the same is true for elliptic geometry and hyperbolic geometry.)
In Euclidean plane geometry, two lines which are perpendicular not only can but must intersect. (I believe the same is true for elliptic geometry and hyperbolic geometry.)