Tukey's Biweight
The function
sometimes used in Robust Estimation. It has a minimum at
and a maximum at 
, where
and an inflection point at
, where
References
Press, W. H.; Flannery, B. P.; Teukolsky, S. A.; and Vetterling, W. T. Numerical Recipes in FORTRAN: The Art of Scientific Computing, 2nd ed. Cambridge, England: Cambridge University Press, p. 697, 1992.
- Fourier-Mellin Integral
- Fourier Series
- Fourier Series--Power Series
- Fourier Series--Right Triangle
- Fourier Series--Square Wave
- Fourier Series--Triangle
- Fourier Series--Triangle Wave
- Fourier Sine Series
- Fourier Sine Transform
- Fourier-Stieltjes Transform
- Fourier Transform
- Fourier Transform--1
- Fourier Transform--Cosine
- Fourier Transform--Delta Function
- Fourier Transform--Exponential Function
- Fourier Transform--Gaussian
- Fourier Transform--Heaviside Step Function
- Fourier Transform Inverse Function
- Fourier Transform--Lorentzian Function
- Fourier Transform--Ramp Function
- Fourier Transform--Rectangle Function
- Fourier Transform--Sine
- Four Travelers Problem
- Four-Vector
- Four-Vertex Theorem