the three to are equal to each other and hence all equal to a single time, s. Hence, the three Atop = 0. It follows that 64,0 = (•61 1+00 — flans al APainfo ipWeakaiPictO Here .aiLkoo = Lka — Lo and similarly for .644,0. We also have &tap = —to • (4[1 + tpEa] — 4[1 + tpE a] + ritp[En — E0]) tpuli(Pia