ResetStartSubstream(g)
Reinitializes the state of RngStream g to the beginning of the current sub-stream.
for i in 1:3 loop
(u[i],g) := CMRG.RandU01(g);
end for;
g := CMRG.ResetStartSubstream(g);
for i in 4:6 loop
(u[i],g) := CMRG.RandU01(g);
end for;
// u = {0.584045,0.18949,0.698993,
// 0.584045,0.18949,0.698993}
function ResetStartSubstream input RngStream g "RngStream"; output RngStream gout "Updated RngStream"; end ResetStartSubstream;