- â\88\80f1,f2,L1,L2. â¦\83L1,f1â¦\84 â«\83ð\9d\90\85+ â¦\83L2,f2â¦\84 →
- ∀g1,I,K1,X. f1 = ↑g1 → L1 = K1.ⓑ{I}X →
- â\88¨â\88¨ â\88\83â\88\83g2,K2. â¦\83K1,g1â¦\84 â«\83ð\9d\90\85+ â¦\83K2,g2â¦\84 & f2 = â\86\91g2 & L2 = K2.â\93\91{I}X
- | â\88\83â\88\83g,g0,g2,K2,W,V. â¦\83K1,g0â¦\84 â«\83ð\9d\90\85+ â¦\83K2,g2â¦\84 &
- K1 â\8a¢ ð\9d\90\85+â¦\83Vâ¦\84 ≘ g & g0 ⋓ g ≘ g1 & f2 = ↑g2 &
+ â\88\80f1,f2,L1,L2. â\9dªL1,f1â\9d« â«\83ð\9d\90\85+ â\9dªL2,f2â\9d« →
+ ∀g1,I,K1,X. f1 = ↑g1 → L1 = K1.ⓑ[I]X →
+ â\88¨â\88¨ â\88\83â\88\83g2,K2. â\9dªK1,g1â\9d« â«\83ð\9d\90\85+ â\9dªK2,g2â\9d« & f2 = â\86\91g2 & L2 = K2.â\93\91[I]X
+ | â\88\83â\88\83g,g0,g2,K2,W,V. â\9dªK1,g0â\9d« â«\83ð\9d\90\85+ â\9dªK2,g2â\9d« &
+ K1 â\8a¢ ð\9d\90\85+â\9dªVâ\9d« ≘ g & g0 ⋓ g ≘ g1 & f2 = ↑g2 &