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Science News
June 17, 2000
Ivars Peterson
Punctured Polyhedra Is there a polyhedron in Euclidean three-dimensional space that has only finitely many plane faces, each of which is a closed connected subset of the appropriate plane whose relative interior in that plane is multiply connected? mark for My Articles similar articles
Science News
December 24, 2005
Ivars Peterson
A Cabinet of Mathematical Curiosities New technologies have made it possible to create 3D models of geometric shapes, magically transforming equations into elegant, intriguing miniatures. mark for My Articles similar articles