Fourier series are much more general than you think
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Check out the university level maths education on my website: https://www.cmmath.org0:00 Intro2:52 Orthogonality3:50 Eigenfunction Expansion8:13 Legendre Ser...

Check out the university level maths education on my website: https://www.cmmath.org/

0:00 Intro 2:52 Orthogonality 3:50 Eigenfunction Expansion 8:13 Legendre Series 17:11 Fourier Series 28:18 The Basel Problem