- â\88\80T1. â\9dªG,Lâ\9d« ⊢ T ⬌*[h,n1,0] T1 →
- â\88\80T2. â\9dªG,Lâ\9d« â\8a¢ T1 â¬\8c*[h,0,n2] T2 â\86\92 â\9dªG,Lâ\9d« ⊢ T ⬌*[h,n1,n2] T2.
+ â\88\80T1. â\9d¨G,Lâ\9d© ⊢ T ⬌*[h,n1,0] T1 →
+ â\88\80T2. â\9d¨G,Lâ\9d© â\8a¢ T1 â¬\8c*[h,0,n2] T2 â\86\92 â\9d¨G,Lâ\9d© ⊢ T ⬌*[h,n1,n2] T2.