2When u(t) = ∞, there is no corresponding block and the following notation xu(t)(t) = x∞(t) is meaningless,
but this is without incidence since the value Rent
x∞(t),∞
= 0.
2When u(t) = ∞, there is no corresponding block and the following notation xu(t)(t) = x∞(t) is meaningless,
but this is without incidence since the value Rentx∞(t),∞ = 0.