Flächengleichheit und Cavalierische Gleichheit von Dreiecken.
Frieze patterns
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
Groups of simple and multiple antisymmetry of similitude in
Groups of simple and multiple ribbon antisymmetry.
Groups of squares and half-equivalences in geometry
Gruppentheoretischer Aufbau affiner Räume einer beliebigen Dimension ... 2 auf der Grundlage von Schrägspiegelungen
"Höhenschnittpunkte" für n-Simplizes.
Hyperbolic geometry in terms of point-reflections or of line-orthogonality.
Hyperbolization of Euclidean ornaments.
Hyperplane complements of large type.
Introduction aux géométries de Hilbert
Invariance of regularity conditions under definable, locally Lipschitz, weakly bi-Lipschitz mappings
We describe the notion of a weakly Lipschitz mapping on a stratification. We also distinguish a class of regularity conditions that are in some sense invariant under definable, locally Lipschitz and weakly bi-Lipschitz homeomorphisms. This class includes the Whitney (B) condition and the Verdier condition.
Invariant resistive networks in Euclidean spaces and their relation to geometry
Geometric properties of finite systems of homogeneous resistive wire segments in a Euclidean -space are studied in the case that the absorption of energy of such a system in an arbitrary linear electrical field is invariant under any orthogonal transformation of the system.
Invariant theory under restricted groups