Assertion: sphere's interior | /r/HasProperty | identified
Facets:
Source sentences:
text: How it is equivalent to the 2-sphere viewed geometrically complex projective line or Stereographic projection; hence homeomorphic and diffeomorphic one-point compactification of the Euclidean plane Stereographic projection; hence homeomorphic and diffeomorphic double cover (and hence also universal cover) of the real projective plane or Identification of antipodal points gives the double cover from to boundary of 3-simplex homeomorphism arising from a straight line homotopy hollow cube in homeomorphism arising from a straight line homotopy quotient of closed unit disk in by the identification of all points in its boundary with each other, i.e., via identification with one-point compactification of : the interior of the disk can be identified with , and the boundary point is identified with the point at infinity.