Weights of each polarization configuration going into the total value of the a,ii mixed f_NL parameter for, from left to right, CDM, neutrino-density, and neutrino-velocity isocurvature, in addition to the adiabatic mode. Since we impose ℓ₁ ≤ ℓ₂ ≤ ℓ₃, there is a difference between, TEE for example (where the smallest ℓ is temperature) and EET (where the largest ℓ is temperature).