... circuit.(a0,a1,a2,a3,a4,a5,a 6 ,a7)(a0,a2,a4,a 6 )(a0,a4)(a2,a 6 )(a0)(a4)(a2)(a 6 )(a1,a3,a5,a7)(a1,a5)(a1)(a5)(a3,a7)(a3)(a7)Figure 30.4 The tree of input vectors to ... 2;3;:::;n.a. Is the sum of two Toeplitz matrices necessarily Toeplitz? What about the prod-uct?b. Describe how to represent a Toeplitz matrix so that you can add two n nToeplitz matrices in O.n/ ... applications. For an excellent introduction to signal processing, a popular FFT application area, see the texts by Oppenheimand Schafer [ 266 ] and Oppenheim and Willsky [ 267 ]. The Oppenheim and Schaferbook...