@online{huang2024fourier,
  author       = {Huang, Xuanqiang Angelo},
  title        = {Fourier Series},
  date         = {2024-08-06},
  organization = {Xuanqiang Angelo Huang's Blog},
  url          = {https://flecart.github.io/notes/fourier-series/},
  langid       = {english},
  abstract     = {Intuition \# The most important observation that allows Fourier series approximation is that given k = 1 , 2 , … we have that 2 π ​ 1 ​ , π ​ cos ( k x ) ​ , π ​ sin ( k x ) ​ , … Form a infinitely dimensional orthonormal basis given the integral relations ∫ 0 2 π ​ ( sin ( k x )}
}