Disjoint Lines in Projective Space
126885
canonical representation of three skew lines in $\mathbb{P}^3$
53261
Show that Pn is an (n+1)-dimensional subspace
139176
The real line is not homeomorphic to any non-trivial product space
89264
Connectedness in the Quotient Space
49040
Great-circle lines in Equirectangular projection
144731
Disjoint closed sets in a second countable zero-dimensional space can be separated by a clopen set
16860
set of almost complex structures on $\mathbb R^4$ as two disjoint spheres
153092
Homology of disjoint union is direct sum of homologies
116378
Nonhomeomorphic subsets of the plane
28819
A union of two subspaces not equal to the vector space.
43170
inverse image of fiber product of scheme
35625
Direct sum of orthogonal subspaces
62260
Rational Coordinates with two intersecting lines
109740
Bresenham's line algorithm
149999
fixed point of a continuous map on a projective space
145273
Disjoint $AC$ equivalent to $AC$
84686
Geometric Description Of a Set In The Complex Plane