Linear colour spaces are obtained by choosing primaries and then constructing colour matching functions for those primar

[answerhappygod]

Linear colour spaces are obtained by choosing primaries and
then constructing colour matching functions for those primaries.
Show that there is a linear transformation that takes the
coordinates of a colour in one linear colour space to those in
another; the easiest way to do this is to write out the
transformation in terms of the colour matching functions.