
 PlanetMath: locally Euclidean 
  as set with a single point equipped with the discrete topology. 
  This is well defined, that is, the local dimension does not depend on the chosen chart. 
  Crossreferences: long line, pathological, sphere, stereographic projection, open subset, open, connected component, path, connected, invariance of dimension, theorem, between, dimension, discrete topology, real numbers, homeomorphism, neighbourhood, topological space 
 planetmath.org /encyclopedia/Chart2.html (133 words) 
