Please let your instructor know if you find additional mistakes so
that we can list them here.

### Mistakes in the text *Contemporary Linear Algebra*, by Anton and Busby

Page 171: In Question 16, the matrices A and B are assumed to be invertible.

Page 179: The second sentence of the **Remark** near the bottom of the
page should be "For a 1 by 1 matrix [a_{11}], the minor and
cofactor of a_{11} are both 1."

Page 281: Theorem 6.2.1 is also true for a linear transformation
*T : R*^{n} → R^{m}, not only for a linear
operator (the case *m = n*).
The proof of Theorem 6.2.4, (b) implies (c), on page 283 uses this
more general form of Theorem 6.2.1.

Page 301: Theorem 6.3.13 should end with "**b** ∈ *R*^{m}."

Page A9: Answer to Exercise Set 1.1 #9a should be B(2,3)

Page A9: Answer to Exercise Set 1.1 #21. The diagrams are using the point
A(-1,0) rather than (0,0) as stated in the question.

Page A9: Answer to Exercise Set 1.1 #25b should have a 1 as the (5,2) entry.

Page A10: Answer to Exercise Set 1.2 #17 should be **x **= (-4/15,
14/15, -6/15, 2/15).

Page A12: Answer to Exercise Set 2.2 #27 should be "no solution".

Page A13: Answer to Exercise Set 3.2 #7a the (2,2)-entry should be
-43, not -47.

Page A16: Answer to Exercise Set 4.2 #39a should be -1080 not -3.

Page A16: Answer to Exercise Set 4.2 #39b should be 1 not -24.

Page A14: Answer to Exercise Set 3.5 #15b the R_{4} should be R_{3}.

Page A18: Answer to Exercise Set 6.2 #7d the 2 should be a 3.

Page A19: Answer to Exercise Set 6.4 #5b the 3 should be a 2.