CAUSALITY (continued) Mathematically (in CT): A system x(t)->y(t) is causal if when x1()→>y1()x(0→>y2() and x1()=x2() for all t≤ Then y(=y2() for all t≤• Mathematically (in CT): A system x(t) → y(t) is causal if CAUSALITY (continued) when x1(t) → y1(t) x2(t) → y2(t) and x1(t) = x2(t) for all t ≤ to Then y1(t) = y2(t) for all t ≤ to