theorem Th59: :: REWRITE3:59

for x, y being object
for E being non empty set
for v, w being Element of E ^omega
for F being Subset of (E ^omega)
for TS being non empty transition-system over F
for P being RedSequence of ==>.-relation TS st P . 1 = [x,v] & P . (len P) = [y,w] holds
len v >= len w