... function f (h) withthe property that lim h 0f (h) /h = 0, that is, o (h) is some unspecified term thatis negligibly small compared to h itself as h → 0. For example, f (h) = h 2is ano (h) -function. ... representation of the Poisson process, we use1 − e h = h − h 22!+ h 33!−··· =h + o (h) as h → 0.6 THE POISSON PROCESS AND RELATED PROCESSESThe mathematical symbol o (h) is the generic notation ... u and the epoch of the first arrival after u has theTHE POISSON PROCESS 5same exponential distribution as the time elapsed between epoch 0 and the epochof the first arrival after epoch 0. Next...