theorem Th47: :: LEXBFS:47
for G being _finite _Graph
for m, n, k being Nat st k < n & n <= m holds
for x being set st not (G .order()) -' k in (((LexBFS:CSeq G) . n) `2) . x holds
not (G .order()) -' k in (((LexBFS:CSeq G) . m) `2) . x