theorem Th63: :: REWRITE3:63

for x, y being object
for E being non empty set
for e being Element of E
for F being Subset of (E ^omega)
for TS being non empty transition-system over F st not <%> E in rng (dom the Tran of TS) holds
for P being RedSequence of ==>.-relation TS st P . 1 = [x,<%e%>] & P . (len P) = [y,(<%> E)] holds
len P = 2