  We calculate the time dependence of B0->f decays (and analogously D0->f
decays) and use this result to obtain expressions for the time dependence of:
an untagged sample (B0->f and Bbar->f decays combined), a sample containing
charge-conjugate final states (B0->f and B0->fbar decays combined), and a
sample containing all four decay modes together. For simplicity we assume CP
violating effects are negligible.
