History of the Jews in Switzerland in the city — more than in any other city in the world. Whereas the communities of Basel and Zürich are traditionally shaped by large Ashkenazi communities, Geneva also hosts an important Sephardic community. Its main synagogue, the Synagogue Hekhal Haness, is considered to be the most important Sephardic synagogue in the whole of Europe. A ring with a Menorah depiction found in Augusta Raurica (Kaiseraugst, Switzerland) in 2001 attests to Hebrew presence in Germania Superior. The Encyclopaedia Judaica mentioned a first documentation in 1214. In the Middle Ages, as in many places in Europe, they frequently suffered persecution, for
Inversion in a sphere a powerful transformation. One simple example is in map projection. The usual projection of the North or South Pole is inversion from the Earth to a plane. If instead of making a pole the centre, we chose a city, then Inversion could produce a map where all the shortest routes (great circles) for flying from that city would appear as straight lines, which would simplify the flight path, for passengers at least. Let the reference sphere be Σ, with centre O and radius r denoted by {O, r}. All inverses, in this paper, are in the sphere Σ. The results