Parallelizable
A sphere 
is parallelizable if there exist 
cuts containing linearly independent tangent vectors. There existonly three parallelizable spheres: 
, 
, and 
(Adams 1962, Le Lionnais 1983).
References
Adams, J. F. ``On the Non-Existence of Elements of Hopf Invariant One.'' Bull. Amer. Math. Soc. 64, 279-282, 1958. Adams, J. F. ``On the Non-Existence of Elements of Hopf Invariant One.'' Ann. Math. 72, 20-104, 1960. Le Lionnais, F. Les nombres remarquables. Paris: Hermann, p. 49, 1983.
- Greatest Common Divisor Theorem
- Greatest Common Factor
- Greatest Integer Function
- Greatest Lower Bound
- Greatest Prime Factor
- Great Hexacronic Icositetrahedron
- Great Hexagonal Hexecontahedron
- Great Icosacronic Hexecontahedron
- Great Icosahedron
- Great Icosahedron-Great Stellated Dodecahedron Compound
- Great Icosicosidodecahedron
- Great Icosidodecahedron
- Great Icosihemidodecacron
- Great Icosihemidodecahedron
- Great Inverted Pentagonal Hexecontahedron
- Great Inverted Retrosnub Icosidodecahedron
- Great Inverted Snub Icosidodecahedron
- Great Pentagonal Hexecontahedron
- Great Pentagrammic Hexecontahedron
- Great Pentakis Dodecahedron
- Great Quasitruncated Icosidodecahedron
- Great Retrosnub Icosidodecahedron
- Great Rhombicosidodecahedron (Archimedean)
- Great Rhombicosidodecahedron (Uniform)
- Great Rhombic Triacontahedron