Department of Mathematics
We have tried our best to minimize errata in this edition. If you find any,
please send a message to sleon@umassd.edu
so that corrections can be made for the next printing.
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Previous versions of MATLAB have all included a command flops, however,
this command was discontinued in version 6 of MATLAB. I did not discover
this change until after the sixth edition had gone to press. Two
exercises in the book currently make use of the flops command. These
exercises are:
page 92 Exercise
2 (a) and (b)
page 186 Exercise 4 (b)
and (c)
I will either try to get these corrected in a later printing or post
new versions of them on the web.
The following errata were corrected
in the second printing.
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In the table of contents the three optional sections have been marked with
both a dagger and an asterisk. The asterisk should be deleted. These sections
are 2.3, 5.7, and 6.8. On page xiii of the Preface it notes that the optional
sections are marked with an asterisk in the contents page. This should
be changed from asterisk to dagger.
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page 338. Exercise 9. The variables y1 and
y2
should be changed to x1 and x2 to be
consistent with the figure.
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page 469. Exercise 13. The equation should read U
= I - 2uuH.
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page 535. In the Chapter Test the answer to the first true-false
question should be false.
The following errata will be corrected
in later printings.
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page 158. In the first line of the proof of Corollary 3.4.2 replace
the word fosr by for.
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page 285. In the line below the last displayed equation on
the page, the subscript for w j-1
should
be 2m rather than m.
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page 290. The second sentence on the page should read:
The method involves using projections to
transform ...
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page 392. In the formula for the remainder R near the bottom
of the page, replace 3h2kFxyy(z)
with the correct term 3h2kFxxy(z).
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page 521. In Section 2 the answer to Exercise 17 should be:
x1 = 2, x2 = 3, x3 =
12, x4 = 6.
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page 525. In Section 2 the answer to Exercise 3 should read:
(a), (d), and (e) are subspaces; (b), (c), and (f) are not.
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page 527. The answer to 10 (a) should be a 3 x
3 matrix. To get the correct matrix, change the sign of the diagonal entries
of the 2 x 2 matrix and then augment
the matrix by adding e3 as the third column and e3T
as the third row.
In the answer to 10 (b) the (2,1) entry of the the matrix should be
0.
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page 534. In exercise 3(b) at the top of the page delete the equation
|| A ||2 = 3.
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page 534. Exercise 4 of Section 5 should not have two parts. Delete
answer (a). The answer (b) is the answer to the entire exercise.
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page 534 In Exercise 5 (a) of Section 5 the brackets, (
), are missing from the vector.
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pages 534 and 535. In Section 7 the solutions numbered 3 and 4 are
actually the solutions to exercises 4 and 5 of that section.
