-theorem drops_trans: â\88\80b1,f1,L1,L. â¬\87*[b1, f1] L1 â\89¡ L →
- â\88\80b2,f2,L2. â¬\87*[b2, f2] L â\89¡ L2 →
- â\88\80f. f1 â\8a\9a f2 â\89¡ f â\86\92 â¬\87*[b1â\88§b2, f] L1 â\89¡ L2.
+theorem drops_trans: â\88\80b1,f1,L1,L. â¬\87*[b1, f1] L1 â\89\98 L →
+ â\88\80b2,f2,L2. â¬\87*[b2, f2] L â\89\98 L2 →
+ â\88\80f. f1 â\8a\9a f2 â\89\98 f â\86\92 â¬\87*[b1â\88§b2, f] L1 â\89\98 L2.