2025-12-12. Main Book: Version 1.01, some minor typos. Answer Book: Version A.1.01, lots of typos and corrections on Chapter 1. 

2025-12-12. Main Book: Version 1.02, minor typos. Answer book: Version A.1.02, many typos and corrections on Chapter 2. 

2025-12-26. Main Book: Version 1.03, a few minor typos and language corrections. Answer Book: Version A.1.03, many  typos and corrections on Chapter 3, and equation numbers in the exercises statements matched with the Book. 

2026-01-02. Main Book: Version 1.04; removed former (wrong) Proposition 6.3.10, plus minor correction in a few exercise statements. Answer Book: Version A.1.04; many typos and corrections in Chapters 4, 5, and 6; Exercise 9.1.6 had been using the wrong Proposition, so the argument has been corrected. 

2026-01-13. Main Book: Version 1.05; typo on introduction to weak topologies and minor mistake corrected in the proof of Lemma 12.3.16; a couple of other minor typos.  Answer Book: Version A.1.05; typos and corrections in Chapters 7 and 8. Corrected the proof of Exercise 7.4.6. Changed the statements of Exercises 7.4.7 and 8.3.4.