Hook Length Formula
A Formula for the number of Young Tableaux associated with a given Young Diagram. Ineach box, write the sum of one plus the number of boxes horizontally to the right and vertically below the box (the ``hooklength''). The number of tableaux is then 
divided by the product of all ``hook lengths''. The Combinatorica`NumberOfTableaux function in Mathematica
implements the hook length formula.
References
Jones, V. ``Hecke Algebra Representations of Braid Groups and Link Polynomials.'' Ann. Math. 126, 335-388, 1987. Skiena, S. Implementing Discrete Mathematics: Combinatorics and Graph Theory with Mathematica. Reading, MA: Addison-Wesley, 1990.
- Gudermannian Function
- Guldinus Theorem
- Gumbel's Distribution
- Guthrie's Problem
- Gutschoven's Curve
- Guy's Conjecture
- Gyrate Bidiminished Rhombicosidodecahedron
- Gyrate Rhombicosidodecahedron
- Gyrobicupola
- Gyrobifastigium
- Gyrobirotunda
- Gyrocupolarotunda
- Gyroelongated Cupola
- Gyroelongated Dipyramid
- Gyroelongated Pentagonal Bicupola
- Gyroelongated Pentagonal Birotunda
- Gyroelongated Pentagonal Cupola
- Gyroelongated Pentagonal Cupolarotunda
- Gyroelongated Pentagonal Pyramid
- Gyroelongated Pentagonal Rotunda
- Gyroelongated Pyramid
- Gyroelongated Rotunda
- Gyroelongated Square Bicupola
- Gyroelongated Square Cupola
- Gyroelongated Square Dipyramid