let D be non empty set ; :: thesis: for d1, d2 being Element of D holds <*d1,d2*> is FinSequence of D
let d1, d2 be Element of D; :: thesis: <*d1,d2*> is FinSequence of D
rng <*d1,d2*> = {d1,d2} by Lm1;
hence <*d1,d2*> is FinSequence of D by FINSEQ_1:def 4; :: thesis: verum