:: deftheorem defines BitFTA3Str FTACELL1:def 19 :
for am, bm, cm, dm, cin being set holds BitFTA3Str (am,bm,cm,dm,cin) = (BitGFA3Str (am,bm,cm)) +* (BitGFA3Str ((GFA3AdderOutput (am,bm,cm)),cin,dm));