theorem Th6: :: ORDINAL4:6

for fi, psi being Ordinal-Sequence
for B, C being Ordinal st dom fi = dom psi & B is_limes_of fi & C is_limes_of psi & ( for A being Ordinal st A in dom fi holds
fi . A c= psi . A or for A being Ordinal st A in dom fi holds
fi . A in psi . A ) holds
B c= C