consider F being sequence of {{}} such that
A1: for n being Element of NAT holds F . n = {} by Th16;
{} in S by PROB_1:4;
then {{}} c= S by ZFMISC_1:31;
then reconsider F = F as sequence of S by FUNCT_2:7;
take F ; :: thesis: F is disjoint_valued
A2: for n being object holds F . n = {}
proof
let n be object ; :: thesis: F . n = {}
per cases ( n in dom F or not n in dom F ) ;
end;
end;
thus for x, y being object st x <> y holds
F . x misses F . y :: according to PROB_2:def 2 :: thesis: verum
proof
let x, y be object ; :: thesis: ( x <> y implies F . x misses F . y )
F . x = {} by A2;
hence ( x <> y implies F . x misses F . y ) ; :: thesis: verum
end;