# Thread: Applications of Non-Euclidean Geometries

1. ## Applications of Non-Euclidean Geometries

Hello all,

I am doing a presentation for my history of math class over the development of non-euclidean geometry. Basically I am attempting to find examples of applications of both spherical and hyperbolic geometries. So far I have only found uses in navigation and the mapping of the celestial sphere for spherical geometry, however, I am trying to find a few more relevant applications perhaps in physics (maybe electric fields?). As for hyperbolic geometry, I only have the application used in the general theory of relativity. Perhaps this question might be suited better to a physics forum..but really I am looking for any interesting applications that I cannot think of. Any help is greatly appreciated!

2. Originally Posted by elizsimca
Hello all,

I am doing a presentation for my history of math class over the development of non-euclidean geometry. Basically I am attempting to find examples of applications of both spherical and hyperbolic geometries. So far I have only found uses in navigation and the mapping of the celestial sphere for spherical geometry, however, I am trying to find a few more relevant applications perhaps in physics (maybe electric fields?). As for hyperbolic geometry, I only have the application used in the general theory of relativity. Perhaps this question might be suited better to a physics forum..but really I am looking for any interesting applications that I cannot think of. Any help is greatly appreciated!
With regards to relativity, an interesting problem deals with the precession of Mercury's orbit. I did a project on this for my differential geometry class, so I share it with you for some kind of inspiration.

3. Not as useful an application, but quite neat: tesselations of the hyperbolic plane in Poincaré disc model are at the core of plenty of M.C.Escher's beautiful artworks, such as the following one.

On a more serious side, and as far as mathematical applications are concerned, hyperbolic geometry has proved itself very important in the last 20 years in Gromov's geometric group theory (Gromov was recently awarded an Abel prize for his work). The rough idea of this theory is to transpose geometric concepts to groups (in particular through their Cayley graph) and derive connections between their algebraic and geometric properties; this geometrical insight enables a better understanding of certain properties. And "hyperbolic groups", i.e. groups whose geometry somehow shares deep properties with standard hyperbolic geometry, play a prominent role in this theory. You'll easily find further information on the web.