TEXTBOOK AND LECTURE-SLIDE ERRATA
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This document contains errata for the following textbook and lecture slides:

    M. D. Adams,
    Signals and Systems (Edition 3.0)
    University of Victoria, Victoria, BC, Canada,
    Dec. 2020.

    M. D. Adams,
    Lecture Slides for Signals and Systems (Edition 3.0)
    University of Victoria, Victoria, BC, Canada,
    Dec. 2020.

Below is a list of errors that have been reported to date.

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Date: 2021-04-24
Name: Michael Adams
Description:

textbook
p. 397
The second equation on the page (which starts "X(m) = ...") has an infinity
above the summation symbol that should not be there.

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Date: 2021-04-25
Name: Michael Adams
Description:

textbook
p. 538
The QED symbol that appears after the end of the first solution approach
should be moved to the end of the second solution approach on the following
page (i.e., p. 539).

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Date: 2021-06-08
Name: Sue Youn Kim
Description:

textbook
p. 106, answer key for part (g) of Exercise 4.18
The limits in the integral for the t < 1 case should be
t-3 (lower limit) and t-1 (upper limit).

solutions manual
p. 122, answer key for part (g) of Exercise 4.18
The answer key has the same error as in the textbook.
(See above.)
p. 131
The final answer has the same error as in the answer key.

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Date: 2021-07-18
Name: Evgenia Karunus
Description:

textbook
p. 50, Section 3.8.1, 1st paragraph, 1st sentence
The text
    Hx(t) does not depend on x(t)
should read
    Hx(t_0) does not depend on x(t)
(i.e., a subscript of 0 is missing).

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Date: 2021-07-18
Name: Michael Adams
Description:

textbook
p. 51, Section 3.8.2, 1st paragraph, 1st sentence
The text
    Hx(t) does not depend on x(t)
should read
    Hx(t_0) does not depend on x(t)
(i.e., a subscript of 0 is missing).

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Date: 2021-07-18
Name: Michael Adams
Description:

textbook
p. 332, Section 8.7.1, 1st paragraph, 1st sentence
The text
    Hx(n) does not depend on x(n)
should read
    Hx(n_0) does not depend on x(n)
(i.e., a subscript of 0 is missing).

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Date: 2021-07-18
Name: Michael Adams
Description:

textbook
p. 333, Section 8.7.2, 1st paragraph, 1st sentence
The text
    Hx(n) does not depend on x(n)
should read
    Hx(n_0) does not depend on x(n)
(i.e., a subscript of 0 is missing).

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Date: 2021-09-27
Name: Sonia Ng
Description:

solutions manual: answer for Exercise A.6(b)
The first line of the solution has two 2's missing.
It should be changed from
   z + 3 + z^{-1} = z^{-1} (z^2 + 3z + 1)
to
   z + 3 + 2 z^{-1} = z^{-1} (z^2 + 3z + 2)

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Date: 2021-09-28
Name: Unknown ECE 260 Student
Description:

solutions manual: answer for Exercise 3.25(b)
The answer for this exercise has several typos.
In particular, every x_1 in the answer should be replaced by x.
and every x_2 in the answer should be replaced by x'.

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Date: 2021-09-28
Name: Sadie Johansen
Description:

solutions manual: answer for Exercise 3.24(e)
The limit being taken should be the limit of "|Hx(t)|" not "Hx(t)"
(i.e., a magnitude operation is missing).

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Date: 2021-10-13
Name: Isabella Rojas
Description:

textbook and solution manual: answer key and final answer for Exercise 4.18(k)
The 3rd case in the expression for x*h in the answer key (and full solution)
is wrong.  The lower and upper limits of the integral should be t-2 and 10.
That is, the text
    \int_{10}^{t-1} (t-\tau-1) d\tau & 11 \leq t < 12
should be changed to
    \int_{t-2}^{10} (t-\tau-1) d\tau & 11 \leq t < 12

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Date: 2021-10-17
Name: Michael Adams
Description:

textbook, p. 634, Section D.15.1, equation (D.1):
Each of the summations have an error in the exponent for the "s".
The exponents should be "n - k" and "m - k" not "n - k - 1" and "n - k - 1".

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Date: 2021-10-21
Name: Scott Kenning
Description:

textbook, p. 630, Section D.14.2:
Some parts of this section are technically incorrect, due to
non-backward-compatible changes made to MATLAB.
To correct this issue, the two occurrences (in this section) of
    sym('pi')
should be changed to
    sym(pi)

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Date: 2021-10-22
Name: Michael Adams
Description:

textbook, p. 631, Section D.14.3:
An error in this section has been introduced by non-backward-compatible
changes made to MATLAB.
To correct this issue, the occurrence (in this section) of
    sym('pi')
should be changed to
    sym(pi)

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Date: 2021-10-25
Name: Alan Chapla
Description:

textbook, p. 135, last line:
The text that reads
    H(\omega) = e^{-\omega/4}
should be changed to
    H(\omega) = e^{-j\omega/4}
(i.e., a "j" is missing)

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Date: 2021-12-03
Name: Xiangyu Ren
Description:

In the solutions manual:
answer for 7.18(b) on p. 287
In the 3rd line of the answer for part (b), an extra term appears in
the equation that should not be there.
In particular, the term -\tfrac{1}{RC} v_1(0^-) should not be there.

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Date: 2021-12-11
Name: Hussein Sharafeddin
Description:

In the textbook, page 106, Exercise 4.18(t).
There is a typo in the problem statement for part (t).
A "u(t)" is missing in the expression for the function x.
That is, the text (in LaTeX format)
    $x(t) = e^{-3t}$
should be changed to
    $x(t) = e^{-3t} u(t)$

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Date:
Name:
Description:

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