Closed Form
A discrete Function 
is called closed form (or sometimes ``hypergeometric'') in two variables if theratios 
and 
are both Rational Functions. A pair of closed form functions 
is said to be a Wilf-Zeilberger Pair if
See also Rational Function, Wilf-Zeilberger Pair
References
Petkovsek, M.; Wilf, H. S.; and Zeilberger, D. A=B. Wellesley, MA: A. K. Peters, p. 141, 1996. Zeilberger, D. ``Closed Form (Pun Intended!).'' Contemporary Math. 143, 579-607, 1993.
- Gauss's Theorema Egregium
- Gauss's Transformation
- Gear Graph
- Gegenbauer Function
- Gegenbauer Polynomial
- Gelfond-Schneider Constant
- Gelfond-Schneider Theorem
- Gelfond's Theorem
- Genaille Rods
- Genera
- Generalized Cone
- Generalized Cylinder
- Generalized Fibonacci Number
- Generalized Function
- Generalized Helicoid
- Generalized Helix
- Generalized Hyperbolic Functions
- Generalized Hypergeometric Function
- Generalized Matrix Inverse
- Generalized Mean
- Generalized Remainder Method
- General Linear Group
- General Orthogonal Group
- General Position
- General Prismatoid