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Geometriae Dedicata is a mathematical journal, founded in 1972, concentrating on geometry and its relationship to topology, group theory and the theory of dynamical systems. It was created on the initiative of Hans Freudenthal in Utrecht, the Netherlands. [1] It is published by Springer Netherlands. The Editor-in-Chief is Richard Alan Wentworth.
Stereohedron. In geometry and crystallography, a stereohedron is a convex polyhedron that tile space so that the symmetries of the resulting tiling take any copy of the stereohedron to any other copy, that is the tiling is facet-transitive. Two-dimensional analogues to the stereohedra are called planigons. Higher dimensional polytopes can also ...
Circle packing in a circle. Circle packing in a circle is a two-dimensional packing problem with the objective of packing unit circles into the smallest possible larger circle .
Honeycomb (geometry) In geometry, a honeycomb is a space filling or close packing of polyhedral or higher-dimensional cells, so that there are no gaps. It is an example of the more general mathematical tiling or tessellation in any number of dimensions. Its dimension can be clarified as n -honeycomb for a honeycomb of n -dimensional space.
The rhombic triacontahedron, sometimes simply called the triacontahedron as it is the most common thirty-faced polyhedron, is a convex polyhedron with 30 rhombic faces. It has 60 edges and 32 vertices of two types. It is a Catalan solid, and the dual polyhedron of the icosidodecahedron. It is a zonohedron . A face of the rhombic triacontahedron.
S. Choi, The Chern Conjecture for Affinely Flat Manifolds Using Combinatorial Methods, Geometriae Dedicata, volume 97 (2003), pp. 81–92; M. Bucher and T. Gelander, Milnor-Wood inequalities for manifolds locally isometric to a product of hyperbolic planes, Comptes Rendus Mathematique, volume 346, numbers 11–12 (2008), pp. 661–666
John Robert Stallings Jr. (July 22, 1935 – November 24, 2008) was a mathematician known for his seminal contributions to geometric group theory and 3-manifold topology. Stallings was a Professor Emeritus in the Department of Mathematics at the University of California at Berkeley [1] where he had been a faculty member since 1967. [1]
Hans Freudenthal. Portrait of prof. dr. H. Freudenthal, 1957. Hans Freudenthal (17 September 1905 – 13 October 1990) was a Jewish German -born Dutch mathematician. He made substantial contributions to algebraic topology and also took an interest in literature, philosophy, history and mathematics education. [1]