@online{huangndspectral,
  author       = {Huang, Xuanqiang Angelo},
  title        = {Spectral Theorem},
  organization = {Xuanqiang Angelo Huang's Blog},
  url          = {https://flecart.github.io/notes/spectral-theorem/},
  langid       = {english},
  abstract     = {The Spectral Theorem: A Theorem-Chain Construction \# Strategic Overview \# The spectral theorem is not one theorem but a family . Here we build the finite-dimensional versions — both for self-adjoint operators on real inner product spaces and normal operators on complex inner prod}
}