let n be Nat; for C being being_simple_closed_curve Subset of (TOP-REAL 2) st n is_sufficiently_large_for C holds
cell ((Gauge (C,n)),((X-SpanStart (C,n)) -' 1),(Y-SpanStart (C,n))) c= BDD C
let C be being_simple_closed_curve Subset of (TOP-REAL 2); ( n is_sufficiently_large_for C implies cell ((Gauge (C,n)),((X-SpanStart (C,n)) -' 1),(Y-SpanStart (C,n))) c= BDD C )
assume A1:
n is_sufficiently_large_for C
; cell ((Gauge (C,n)),((X-SpanStart (C,n)) -' 1),(Y-SpanStart (C,n))) c= BDD C
then
Y-SpanStart (C,n) <= ((2 |^ (n -' (ApproxIndex C))) * ((Y-InitStart C) -' 2)) + 2
by Th5;
hence
cell ((Gauge (C,n)),((X-SpanStart (C,n)) -' 1),(Y-SpanStart (C,n))) c= BDD C
by A1, Def3; verum