• Iron Lynx
    link
    English
    6
    edit-2
    2 months ago

    … Isn’t AT, where A is:

    [a b]
    [c d]
    

    just

    [a c]
    [b d]
    
    • Kogasa
      link
      fedilink
      English
      52 months ago

      Yes. A matrix is unitary if the conjugate transpose (conjugate as in “complex conjugate”) is equal to its inverse.