theorem Th29: :: MODELC_3:29

for n being Nat
for L being FinSequence
for F, v being LTL-formula st L is_Finseq_for v & F in the LTLnew of (CastNode ((L . 1),v)) & 1 < n & n <= len L & not F in the LTLnew of (CastNode ((L . n),v)) holds
ex m being Nat st
( 1 <= m & m < n & F in the LTLnew of (CastNode ((L . m),v)) & not F in the LTLnew of (CastNode ((L . (m + 1)),v)) )