(3) The selection of Zmax
Let Zv = 1, the results computed by using formulae outside the sphere are listed in Table 3. It can be seen from Table.3 that
Zmax = 5.0 - 8.0 rs=4.0 - 4.6
For H = 68 and M = 1 we have Z < 5.78, therefore the QSOs of Z > 5 may be observed. But Z > 8 is not observed in any way. If we cannot find Z=5.78 QSO, or Z > 5.78 QSO is discovered, then the group of parameter adopted by me must to change.