q-Vandermonde Sum
where
is a Heine Hypergeometric Series.See also Chu-Vandermonde Identity, Heine Hypergeometric Series
References
Andrews, G. E. 
-Series: Their Development and Application in Analysis, Number Theory, Combinatorics, Physics, and Computer Algebra. Providence, RI: Amer. Math. Soc., pp. 15-16, 1986.
- Durand's Rule
- Durfee Polynomial
- Durfee Square
- Dvoretzky's Theorem
- Dyad
- Dyadic
- Dyck's Theorem
- Dye's Theorem
- Dymaxion
- Dynamical System
- Dynkin Diagram
- Dürer's Conchoid
- Dürer's Magic Square
- Dürer's Shell Curve
- e
- Ear
- Early Election Results
- Eban Number
- Eberhart's Conjecture
- Eccentric
- Eccentric Angle
- Eccentric Anomaly
- Eccentricity
- Eccentricity (Graph)
- Echidnahedron