On Jan 27, 6:46 pm, WM <mueck...@rz.fh-augsburg.de> wrote: > On 27 Jan., 18:32, William Hughes <wpihug...@gmail.com> wrote: > > > On Jan 27, 6:05 pm, WM <mueck...@rz.fh-augsburg.de> wrote: > > > <snip> > > > >..the diagonal > > > cannot differ from all lines > > > (it differs from every line, though). > > > The fact that the diagonal differs from every line is > > enough to show (induction) that the diagonal is not > > equal to any line in the list. > > No.
Let the antidiagonal be d and the nth line be l(n)
We know that for each n in |N, d is not equal to l(n)