a) The tristimulus values of monochromatic stimuli of equal radiant power. The three values of a set of color-matching functions at a given wavelength are called color-coefficients. The colormatching functions may be used to calculate the tristimulus values of a color stimulus from the color stimulus function. b) The tristimulus value per unit wavelength interval and unit spectral radiant flux. c) A set of three simultaneous equations used to transform a color specification from one set of matching stimuli to another. Note: Color-matching functions adopted by the CIE are tabulated as functions of wavelength throughout the spectrum and are given in Section 13.5 of ANSI/IES RP16-1986.