-theorem tdeq_repl: â\88\80h,o,T1,T2. T1 â\89¡[h, o] T2 →
- â\88\80U1. T1 â\89¡[h, o] U1 â\86\92 â\88\80U2. T2 â\89¡[h, o] U2 â\86\92 U1 â\89¡[h, o] U2.
+theorem tdeq_repl: â\88\80h,o,T1,T2. T1 â\89\9b[h, o] T2 →
+ â\88\80U1. T1 â\89\9b[h, o] U1 â\86\92 â\88\80U2. T2 â\89\9b[h, o] U2 â\86\92 U1 â\89\9b[h, o] U2.