let f, h be MultOps of the carrier of K, carr G; :: thesis: ( len f = len (carr G) & ( for j being Element of dom (carr G) holds f . j = the lmult of (G . j) ) & len h = len (carr G) & ( for j being Element of dom (carr G) holds h . j = the lmult of (G . j) ) implies f = h )
assume that
A21: len f = len (carr G) and
A22: for j being Element of dom (carr G) holds f . j = the lmult of (G . j) and
A23: len h = len (carr G) and
A24: for j being Element of dom (carr G) holds h . j = the lmult of (G . j) ; :: thesis: f = h
reconsider f9 = f, h9 = h as FinSequence ;
A25: now :: thesis: for i being Nat st i in dom f9 holds
f9 . i = h9 . i
let i be Nat; :: thesis: ( i in dom f9 implies f9 . i = h9 . i )
assume i in dom f9 ; :: thesis: f9 . i = h9 . i
then reconsider i9 = i as Element of dom (carr G) by A21, FINSEQ_3:29;
f9 . i = the lmult of (G . i9) by A22;
hence f9 . i = h9 . i by A24; :: thesis: verum
end;
( dom f9 = Seg (len f9) & dom h9 = Seg (len h9) ) by FINSEQ_1:def 3;
hence f = h by A21, A23, A25, FINSEQ_1:13; :: thesis: verum