9 l k j h i h e f g f e d _ n ^ o r q u \ u n o r n r q u s o r q p o n s o r n z q y x w o r q v u t o r q s o r q p o n m o 3 * 2 2 ) 1 0 / , * ) (' & 4 h g f e d c b a?1 If g(x) is real, then G(s) is Hermitian symmetric (eg G(s) = G*(s)) 2 If g(x) is real and even, G(s) is real and even 3 If g(x) is real and odd, G(s) is imaginary and odd 4 If g(x) is real, G(s) can be defined strictly by nonnegative frequencies (s ≥0) 5 If g(x) is imaginary, then G(s) is AntiHermitian symmetric (eg G(s) = G*(s)) Proof of 1F b g b k l ? Shutterstock Puzzlepix X^[EgbN C"gDE_[NlX LXg