Line Segment
A closed interval corresponding to a Finite portion of an infinite Line. Line segments are generally labeledwith two letters corresponding to their endpoints, say 
and 
, and then written 
. The length of the line segment isindicated with an overbar, so the length of the line segment would be written 
.
Curiously, the number of points in a line segment (Aleph-1) is equal to that in an entire 1-DSpace (a Line), and also to the number of points in an 
-D Space, as first recognized byGeorg Cantor. 
- Giuga Sequence
- Glaisher-Kinkelin Constant
- Glide
- Glissette
- Global C(G;T) Theorem
- Global Extremum
- Global Maximum
- Global Minimum
- Globe
- Glove Problem
- Glue Vector
- Gnomic Number
- Gnomon
- Gnomonic Projection
- Gnomon Magic Square
- G-Number
- Go
- Goblet Illusion
- Goldbach Conjecture
- Golden Mean
- Golden Ratio
- Golden Ratio Conjugate
- Golden Rectangle
- Golden Rule
- Golden Section