I read that
Any "well-behaved" function of period $2\pi$ can be expressed as a Fourier series.
What qualifies as "well-behaved"? Any examples of functions that cannot be expressed as a Fourier series?
Thanks.
I read that
Any "well-behaved" function of period $2\pi$ can be expressed as a Fourier series.
What qualifies as "well-behaved"? Any examples of functions that cannot be expressed as a Fourier series?
Thanks.