In 5.1. Interpolating colors based on headroom is a note:
Note: The factor eps is to prevent division by zero, and the value is chosen to match that used in [SMPTE-ST-2094-50].
As a draft text of SMPTE-ST-2094-50 has recently been released to the public I had a look and am unable to find a factor called eps or the value 0.001
@ccameron-chromium could you help me out with a section number or equation number?