Galilean plane with commutative and nonlinear geometry.
Generators of the unitary group of characteristic 2.
Geometry without topology as a new conception of geometry.
G-Hüllen metrischer Teilräume.
Gluing Hyperconvex Metric Spaces
We investigate how to glue hyperconvex (or injective) metric spaces such that the resulting space remains hyperconvex. We give two new criteria, saying that on the one hand gluing along strongly convex subsets and on the other hand gluing along externally hyperconvex subsets leads to hyperconvex spaces. Furthermore, we show by an example that these two cases where gluing works are opposed and cannot be combined.
Gromov Minimal Fillings for Finite Metric Spaces