资料来源 : Free On-Line Dictionary of Computing

complete metric space
     
         A {metric space} in which every sequence that
        converges in itself has a limit.  For example, the space of
        {real numbers} is complete by {Dedekind's axiom}, whereas the
        space of {rational numbers} is not - e.g. the sequence a[0]=1;
        a[n_+1]:=a[n]/2+1/a[n].
     
        (1998-07-05)