Clairaut's Differential Equation
or
where
is a Function of one variable and 
. The general solution is 
. The singularsolution Envelopes are 
and 
.See also d'Alembert's Equation
References
Boyer, C. B. A History of Mathematics. New York: Wiley, p. 494, 1968.
- Wynn's Epsilon Method
- Wythoff Array
- Wythoff Construction
- Wythoff's Game
- Wythoff Symbol
- x-Axis
- Xi Function
- x-Intercept
- XOR
- Yacht
- Yanghui Triangle
- y-Axis
- Yff Center of Congruence
- Yff Points
- Yff Triangles
- y-Intercept
- Yin-Yang
- Young Diagram
- Young Girl-Old Woman Illusion
- Young Inequality
- Young's Integral
- Young Tableau
- Z
- Z-
- Z+