An extremal characterization of projective planes.
An intrinsic characterization of foldings of euclidean space
An invariance property of the tridens curve in the isotropic plane.
An isoperimetric inequality for the area of plane regions defined by binary forms
An O(n log n) Algorithm for the All-Nearest-Neighbors Problem.
An optimal relative isoperimetric inequality in concave cylindrical domains in .
An unexpected appearance of Steiner's hypocycloid.
An unusual way to generate conic sections. Related Euclidean constructions.
An upper bound for a sequence of cevian inequalities.
An Upper Bound for the Minimum Diameter of Integral Point Sets.
Analogies entre espaces hyperboliques réels et l’arbre de Bruhat-Tits sur
Analyse dans les topos lisses
Analytické vyjádření pohybu v prostoru
Analytický důkaz spůsobu, jakým lze sestrojiti normálu k ellipse
Analytische Geometrie der höheren ebenen Curven [Book]
Andreev’s Theorem on hyperbolic polyhedra
In 1970, E.M.Andreev published a classification of all three-dimensional compact hyperbolic polyhedra (other than tetrahedra) having non-obtuse dihedral angles. Given a combinatorial description of a polyhedron, , Andreev’s Theorem provides five classes of linear inequalities, depending on , for the dihedral angles, which are necessary and sufficient conditions for the existence of a hyperbolic polyhedron realizing with the assigned dihedral angles. Andreev’s Theorem also shows that the resulting...
Angeordnete affine Ebenen als Ebenen mit einem System von Halbgeraden, und euklidische Ebenen, die genau eine Anordnung besitzen.
Angeordnete affine Klingenbergsche Ebenen
Angeordnete affine lokale Ternärringe und angeordnete affine Klingenbergsche Ebenen
Angle-preserving transformations of spheres.