... ˜ ∆ 11 = t ( P2 )t ( P3 ) – t3 ( P )t ( P ) ˜ ˜ ˜ ˜ ∆ 12 = t ( P2 )t ( P3 ) – t1 ( P )t ( P ) ˜ ˜ ˜ ˜ ∆ 13 = t ( P2 )t ( P3 ) – t2 ( P )t ( P ) ˜ ˜ ˜ ˜ ∆ 21 = t ( P1 )t ( P3 ) – t2 ( P )t ( P ... for another set of primaries (16) Let (P1), (P2), (P3) be the original set of primaries with spectral energy distributions P1 ( λ ), P2 ( λ ), P3 ( λ ), with the units of a match determined by ... plus (P3) and (P2) plus (C) If a match is achieved by this configuration, tristimulus value T2 ( C ) will be negative If this configuration fails, a match is attempted between (P2) plus (P3) and...