(1) | p(t) = p_i + \int_{-\infty}^t \, p_u(t-\tau) \, \delta q(\tau) \, d \tau |
Discrete form:
(2) | p(t) = p_i + \sum_k \, p_u(t-\tau_k) \, q(\tau_k) |
(1) | p(t) = p_i + \int_{-\infty}^t \, p_u(t-\tau) \, \delta q(\tau) \, d \tau |
Discrete form:
(2) | p(t) = p_i + \sum_k \, p_u(t-\tau_k) \, q(\tau_k) |