let r1, r2 be FinSequence of REAL n; ( len r1 = n & ( for i being Nat st 1 <= i & i <= n holds
r1 . i = |(x0,(Base_FinSeq n,i))| * (Base_FinSeq n,i) ) & len r2 = n & ( for i being Nat st 1 <= i & i <= n holds
r2 . i = |(x0,(Base_FinSeq n,i))| * (Base_FinSeq n,i) ) implies r1 = r2 )
assume that
A6:
len r1 = n
and
A7:
for i being Nat st 1 <= i & i <= n holds
r1 . i = |(x0,(Base_FinSeq n,i))| * (Base_FinSeq n,i)
and
A8:
len r2 = n
and
A9:
for i being Nat st 1 <= i & i <= n holds
r2 . i = |(x0,(Base_FinSeq n,i))| * (Base_FinSeq n,i)
; r1 = r2
for k being Nat st 1 <= k & k <= n holds
r1 . k = r2 . k
hence
r1 = r2
by A6, A8, FINSEQ_1:18; verum