Errors in 451 textbook, compiled in part from list from Hanoch Lev-Ari at Northeastern Univ. should be a constant multiplier 2B/Fs on the right hand side of the equation (1.4.23) 40 1.6 uses T_p in two different ways 58 example (f) should end with 12, 12, 12, ... not 12, 0, ... 63 (2.2.12) not well defined - just ignore 63, 65, 69, 69 the "theorems" are actually just Definitions 65 before 2.2.26, "A system is linear..." should be "a relaxed system is linear..." 79 2.3.23 and preceding equation, sum should be over k not h 88 should be h\conj(-n) / |h(-n)| ... near bottom 89 12th line: |h(n)| should be |h(k)| 121 incorrect quantization at t=2T,3T 140 2.24 sum over k not n 141 2.32 missing arrow for h_1(n), use the first element 150 figure caption should be P2.64 152 3.1.1 missing arrow a c 154 it is claimed that absolute summability is equivalent to the p152 definition of the ROC being the "set where X(z) attains a finite value." these are not equivalent, since x[n] = (1/n) u[n-1] is not absolutely summable, yet X(z) has a finite value for z=-1. 156 eqn 3.1.9 extra - sign 173 missing j in 1/(2j) in 'imaginary part' line of table. 204 before (3.6.5) "3.4.7" should be 3.3.7 213-220 Schur not Sch\"{u}r ? 217 Real and distinct poles should be a_1^2 > 4 a_2 223 3.18 c missing j in 1/(2j) 227 3.50 the other zero is at (1/r)exp{-jw0} (missing '-') 241 Fig. 4.7b x_p(t) not x(t) for bottom figure 241 Fig. 4.7b T_p not Tp/2 for rightmost label 243 Incorrect discussion of absolutely integrable vs square integrable! 256 in (4.2.31) lim_{N\rightarrow\infty} \{ \sup_{\omega} ... \} 268 First equation for X1(omega), the last term of equation exp(j(omega-pi/2)) should be exp(j(omega/2-pi/2)) 276 Fig. 4.22 lowest arrow in graph pointing wrong direction 305 |n| > L in table 4.6 for discrete rect 353 sin in wrong font, bottom line 358 4.6.9 missing a negative sign before sum 371 Fig. p4.10 axis tic marks spaced confusingly 374 4.22 subparts mislabeled 374 4.22b missing j in exponent 375 4.25b M/2 < n <= M (the book has 2 instead of n) 399 e^{-j\om n} should be e^{-j\om N} in middle of page for \hat{X}{\om} 399 e^{-j2\pi knN} should be e^{-j2\pi kn/N} above 5.1.2 400 3rd line from the last. one parenthesis missing {X(2pik/N} should be {X(2pik/N)} 409 (5.1.40) the expression of Fourier series missing t term exp(j2pikFo) should be exp(j2pikFot) 415 5.2.31 looks different than 4.3.37 only because the order of terms differs. 441 problem 5.7: k_0 rather than k 442 pr. 5.12a, 5 not 6 444 missing n in 5.23e, n should be pi in 5.23g 460 too many points - 4 points per butterfly only 464 Fig. 6.10, missing -1 in bottom branch 482 in 6.3.11, extra "n" in exponent of definition of z_k 619 Missing |H(\om)| in middle of page 624 8.2.24 -\pi to \pi 626 in Table 8.1, it should be w(n) not h(n) 695 next to last row, \Omega_c should be \Omega_p 699 table 8.13 caption should be \om_p 699 table 8.13 bandstop denominator should have a_2 z^{-2} 730 Fig P8.19 is mislabeled as P8.14 731 8.21 H_a(s) = 1/(s+\alpha) 732 fig 8.22: -0.4\pi wrong sign for positive \om 732 8.22b: cos(2\pi n / (M-1)), and extra "n" in n limits 735 Fig. P8.25, R_x and T_x should be F_s and T_s 750 below 9.2.1, first x_L should be x_2 D2 pzplotz now "zplane"