Equation Icon  ( 1 0 0 0 ) ( a ) ( a ) | | | 1 | | 1| | − it 1 0 − r | | a2 | = | 0 | = Msystem ⃗asol = ⃗ainput, (9 ) ( 0 0 1 0 ) ( a3 ) ( a3) − r 0 − it 1 a4 0