Equation Icon  1 ℒξA3 = dΔ2 , ℒ ξA6 = d Δ5 − --Δ2 ∧ R4 , M -theory (163 ) 2 ℒξB2 = dλ1, ℒξCp+1 = dωp − dωp −2 ∧ H3 , Type IIA/B (164 )