Topology

Is every regular paratopological group Tychonoff? ★★

Author(s): unknown

Question   Is every regular paratopological group Tychonoff?

Keywords: paratopological group; Tychonoff; Tychonoff space

Posted by porton
updated May 11th, 2008
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Geometry » Polytopes

Cube-Simplex conjecture ★★★

Author(s): Kalai

Conjecture   For every positive integer $ k $, there exists an integer $ d $ so that every polytope of dimension $ \ge d $ has a $ k $-dimensional face which is either a simplex or is combinatorially isomorphic to a $ k $-dimensional cube.

Keywords: cube; facet; polytope; simplex

Posted by mdevos
updated May 9th, 2008
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