title: Boundaries of the visible gamut in a CIE color space
body: <p>I would like to know if there is any mathematical way to determine the boundaries of the <strong>visible spectrum/gamut</strong> in a CIE color space (<em>e.g.</em> Lab, XYZ). Thank you in advance!
  <img src="https://i.stack.imgur.com/laTZU.jpg" alt="enter image description here"></p>