Errata for 'Algebra - Notes from the Underground' (2021)
Highlighted in red are the needed changes, embedded
in text matching the published version and identified by page and position
on the page (e.g., `p.10, top'). A bold reference indicates an
error in the published version which may be more confusing, such as a
missing hypothesis in an exercise.
This list is bound to grow forever. (30 items so far.)
The contribution of many readers is gratefully acknowledged.
Last updated: 5/30/22.
Chapter 1
- p.9, bottom:
- p.11, top:
- p.21, Exercise 1.24:
- p.21, Exercise 1.26:
Chapter 2
- p.40, Exercise 2.21:
Chapter 3
- p.49, top:
- p.58, Exercise 3.20:
- p.58, Exercise 3.22:
Chapter 4
- p.66, Example 4:22:
- p.70, top:
- p.74, Example 4.43:
Chapter 5
- p.79, Example 5.4:
- p.90, Proof of Theorem 5.37:
- p.94, third paragraph:
- p.103, Exercise 5.10:
Chapter 6
- Example 6.14:
- p.110, Paragraph following Definition 6.16:
- p.124, Theorem 6.45:
- p.127, Exercise 6.14:
- p.127, Exercise 6.15:
- p.128, Exercise 6.22:
- p.128, Exercise 6.23:
Chapter 7
- p.148, top:
Chapter 9
- p.196, top:
- p.201, Exercise 9.19:
Chapter 12
- Exercise 12.20:
Appendix A
- p.391, Example A14:
- p.400, last bullet point:
Appendix B
- p.404, Exercise 1.26:
- p.407, Exercise 3.14:
- p.409, Exercise 4.19:
