van der Pol Equation
An Ordinary Differential Equation which can be derived from the Rayleigh Differential Equation bydifferentiating and setting 
. It is an equation describing self-sustaining oscillations in which energy is fed intosmall oscillations and removed from large oscillations. This equation arises in the study of circuits containing vacuumtubes and is given by
See also Rayleigh Differential Equation
References
Kreyszig, E. Advanced Engineering Mathematics, 6th ed. New York: Wiley, pp. 165-166, 1988.
- Spherical Bessel Function
- Spherical Bessel Function of the First Kind
- Spherical Bessel Function of the Second Kind
- Spherical Bessel Function of the Third Kind
- Spherical Cap
- Spherical Coordinates
- Spherical Design
- Spherical Excess
- Spherical Frustum
- Spherical Geometry
- Spherical Hankel Function of the First Kind
- Spherical Hankel Function of the Second Kind
- Spherical Harmonic
- Spherical Harmonic Addition Theorem
- Spherical Harmonic Closure Relations
- Spherical Harmonic Tensor
- Spherical Helix
- Spherical Point System
- Spherical Polygon
- Spherical Ring
- Spherical Sector
- Spherical Segment
- Spherical Shell
- Spherical Spiral
- Spherical Symmetry