A piecewise regular function which
- 1. Has a finite number of finite discontinuities and
- 2. Has a finite number of extrema
can be expanded in a Fourier Series which converges to the function at continuous points and the mean of
the Positive and Negative limits at points of discontinuity.
See also Fourier Series
© 1996-9 Eric W. Weisstein
1999-05-24