Skeleton
The Graph obtained by collapsing a Polyhedron into the Plane. The number oftopologically distinct skeletons 
with 
Vertices is given in the following table.
| |
| 4 | 1 |
| 5 | 2 |
| 6 | 7 |
References
Gardner, M. Martin Gardner's New Mathematical Diversions from Scientific American. New York: Simon and Schuster, p. 233, 1966.
- Isosceles Tetrahedron
- Isosceles Triangle
- Isoscelizer
- Isospectral Manifolds
- Isothermal Parameterization
- Isotomic Conjugate Point
- Isotomic Lines
- Isotone Map
- Isotope
- Isotopy
- Isotropic Tensor
- Isovolume Problem
- Isthmus
- Iterated Exponential Constants
- Iterated Function System
- Iterated Radical
- Iteration Sequence
- Itô's Lemma
- Itô's Theorem
- Iverson Bracket
- Iwasawa's Theorem
- j
- Jackson's Difference Fan
- Jackson's Identity
- Jackson's Theorem