theorem Th34:
  for G being non empty-yielding Matrix of TOP-REAL 2 holds 1<=len
  G & 1<=width G
proof
  let G be non empty-yielding Matrix of TOP-REAL 2;
  ( not len G=0)& not width G=0 by MATRIX_0:def 10;
  hence thesis by NAT_1:14;
end;
