curvature

Is the Universe finite, with an edge, or infinite, with no edges? Or is it
even stranger: finite but with no edges? It sounds far-fetched but the
mathematical theory of topology makes it possible, and nobody yet knows
the truth. Janna Levin tells us more.
Tags: cosmology : compact universe : connectedness : Möbius strip : klein bottle : tiling : curvature

Tags: curvature : trigonometry : escher : Euclidean geometry : Euclid's Elements : flatness : spherical geometry : hyperbolic geometry : Mercator projection : curvature of space

The work of Donald Coxeter, who died on 31 March 2003, will continue to
inspire both mathematicians and artists.
Tags: curvature : mathematics and art : escher : hyperbolic geometry : mathematics in the media : symmetry : group theory : geodesic dome