Envelope Theorem
Relates Evolutes to single paths in the Calculus of Variations. Proved in the general case byDarboux and Zermelo (1894) and Kneser (1898). It states: ``When a single parameter family of external paths from a fixed point
has an Envelope, the integral from the fixed point to any point 
on the Envelope equals the integral fromthe fixed point to any second point 
on the Envelope plus the integral along the envelope to the first point on theEnvelope, 
.''
References
Kimball, W. S. Calculus of Variations by Parallel Displacement. London: Butterworth, p. 292, 1952.
- Gallucci's Theorem
- Galois Extension Field
- Galois Field
- Galois Group
- Galoisian
- Galois Imaginary
- Galois's Theorem
- Galois Theory
- Gambler's Ruin
- Game
- Game Expectation
- Game Matrix
- Game of Life
- Game Theory
- Gamma Distribution
- Gamma Function
- Gamma Group
- Gamma-Modular
- Gamma Statistic
- Garage Door
- Garman-Kohlhagen Formula
- Gate Function
- Gauche Conic
- Gaullist Cross
- Gauss-Bodenmiller Theorem