array:5 [
  "content-type" => array:1 [
    0 => "text/html; charset=UTF-8"
  ]
  "cache-control" => array:1 [
    0 => "no-cache, private"
  ]
  "date" => array:1 [
    0 => "Wed, 25 Dec 2024 08:16:24 GMT"
  ]
  "set-cookie" => array:2 [
    0 => "XSRF-TOKEN=eyJpdiI6IjRybFJsb0Rpb2ZpMHkxOUY4OWwrUXc9PSIsInZhbHVlIjoiQVBmSkF2OHVJYjNPcGVUTUQ1MVFaZjBPcUlSVTA4bG9hMU5QQXlaSy9SOCt0RGxEdWtPUUpFdThrSE1obkM5cEhuQm9aMWNHV0Q1U0FjSWY2bHJGdkg0eVJLNCt2REcrcWRBRUpwQ0Fzd0t5TmVLYUNDZFBPRGFiaDBmVWlnMTMiLCJtYWMiOiI5ZWI3NTkyOWJjYzRjMDZhYmI5YjkxNzYwZjM3NWQyMzFmMWRkM2EyYjliZjBjMGU2ZDBlN2RhMTBiOWQ1NjViIiwidGFnIjoiIn0%3D; expires=Wed, 25 Dec 2024 10:16:24 GMT; Max-Age=7200; path=/; domain=.24houranswers.com; samesite=lax"
    1 => "24houranswers_session=eyJpdiI6IlFJNElvaVhBT2tHSzR2cXBJSExVTWc9PSIsInZhbHVlIjoiRHVFMllWcEl2MjFkeFpMNEVMdVYzZnAzeXVYOUpWSm9xQ0l4M1Y4bEFVeTRnSlpBbk5XMHc0aUVGMFZ3YkZaZnh5MDVRZENhdWs1eThFUXVwTExUbTlxdTlsNG9wL0g5MTYxaFZrcWxRNTlyaTd0U0srNVAwWDlaVUxtbUJQYXoiLCJtYWMiOiJkM2Y1NDcwZGNiOWE5Y2FkOGNlYWI2M2QzMjA5YjUwZDVmZjVkZmQxODJhZDQ1NmEyNGEyNTQ5ZTQ3MGFmODk2IiwidGFnIjoiIn0%3D; expires=Wed, 25 Dec 2024 10:16:24 GMT; Max-Age=7200; path=/; domain=.24houranswers.com; httponly; samesite=lax"
  ]
  "Set-Cookie" => array:2 [
    0 => "XSRF-TOKEN=eyJpdiI6IjRybFJsb0Rpb2ZpMHkxOUY4OWwrUXc9PSIsInZhbHVlIjoiQVBmSkF2OHVJYjNPcGVUTUQ1MVFaZjBPcUlSVTA4bG9hMU5QQXlaSy9SOCt0RGxEdWtPUUpFdThrSE1obkM5cEhuQm9aMWNHV0Q1U0FjSWY2bHJGdkg0eVJLNCt2REcrcWRBRUpwQ0Fzd0t5TmVLYUNDZFBPRGFiaDBmVWlnMTMiLCJtYWMiOiI5ZWI3NTkyOWJjYzRjMDZhYmI5YjkxNzYwZjM3NWQyMzFmMWRkM2EyYjliZjBjMGU2ZDBlN2RhMTBiOWQ1NjViIiwidGFnIjoiIn0%3D; expires=Wed, 25-Dec-2024 10:16:24 GMT; domain=.24houranswers.com; path=/"
    1 => "24houranswers_session=eyJpdiI6IlFJNElvaVhBT2tHSzR2cXBJSExVTWc9PSIsInZhbHVlIjoiRHVFMllWcEl2MjFkeFpMNEVMdVYzZnAzeXVYOUpWSm9xQ0l4M1Y4bEFVeTRnSlpBbk5XMHc0aUVGMFZ3YkZaZnh5MDVRZENhdWs1eThFUXVwTExUbTlxdTlsNG9wL0g5MTYxaFZrcWxRNTlyaTd0U0srNVAwWDlaVUxtbUJQYXoiLCJtYWMiOiJkM2Y1NDcwZGNiOWE5Y2FkOGNlYWI2M2QzMjA5YjUwZDVmZjVkZmQxODJhZDQ1NmEyNGEyNTQ5ZTQ3MGFmODk2IiwidGFnIjoiIn0%3D; expires=Wed, 25-Dec-2024 10:16:24 GMT; domain=.24houranswers.com; path=/; httponly"
  ]
]
4.18. Let { X, } be any stationary series with continuous spectral...
