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- (5/5) The grades are now posted. You can view your grade by logging into CIS. (Among those students who took the final exam, ~40% got A. ~35% got B+, B or B-. Good work. Thanks for being a great class!)
- (4/26) There is a free 4-week summer math program in Number Theory (6/11-7/6). Details can be found here, by scrolling down to New! Free Summer Program.
- (4/24) The final exam will be Wednesday, 2 May, 10:30-12:30, in the same classroom. As announced, there will be 60% of problems similar to those in the 4 midterm exams.
- (4/19) There will be a "proof problem" in MT4. It is either the inequalities on p.685 or Theorem 1 on p.696.
- (4/17) The fourth midterm exam is set on 24th April. Also, we will discuss the final exam and the upcoming midterm exam on Thursday 4/19.
- (4/12) We will likely to have 4th midterm exam on 24th April. This will be finalized on 4/17 during the class.
- (4/10) We will discuss the date of last midterm exam on Thursday, 12th April. Please attend the class or email me any comments you might have.
- (4/5) HW #7 (c) in Section 9.3 is
**NOT transitive**, as both (a2,a3) and (a3,a3) are both in R, but (a2,a2) is not in R. Thanks to Amy who pointed this out to me! - (3/29) The final exam is set on 2nd May, 10:30-12:30. The fourth midterm exam will be on 19th or 24th April.
- (3/20) The review for the third midterm exam will be held on 3/28, 5-6PM, in JWB 333, unless otherwise ammended in class on 3/27.
- (3/15) Sections 7.3 and 7.4 will be covered on 27th Tuesday. Midterm exam coverage will likely include up to Section 7.4. (That is, Chapters 5, 6, 7 and 8.4.) It will be finalized on 3/27.
- (3/6) The third midterm exam date is changed to Thursday, 29th March.
- (2/20) Second Midterm Exam date is changed to Tuesday, 2/27. Also the HW due on Tuesday (2/20) is changed to Thursday (2/22).
- (2/15) The second midterm exam is set on Thursday, 22 February. Please make sure that you attend the exam. No make-up exam is possible except in rare situations as listed in the syllabus.
- (1/28) As announced in class, there will be an additional office hour on Monday, 29 Jan, 5-6PM.
- (1/23) The first midterm exam is set on Tuesday, 30th January. Please make sure that you attend the exam. No make-up exam is possible except in rare situations as listed in the syllabus.
- (1/18) The first midterm exam date is moved, perhaps to 30th January. It will cover Chapters I and II. Will discuss this in class on Tuesday 23rd Jan.

- Problems will be posted after each lecture.
**Always read the textbook and lecture notes!** - (Due 1/16)
**Sect 1.1:**11, 17, 23(acdeh), 31(bde), 32(ace), 43(a).**Sect 1.2:**20, 33, 41(b), 43.**Sect 1.3:**9(ef), 19, 25.**Sect 1.4:**9, 15(ab), 17(ef), 19(bce).**Sect 1.5:**25, 31(d), 39, 45. - (Due 1/23)
**Sect 1.6:**13(a), 27.**Sect 1.7:**8, 12, 15, 25, 39.**Sect 1.8:**10, 11, 13, 14, 19, 22, 29, 35, 36, 44, 47.**Sect 2.1:**23, 24, 35, 43. - (Due 1/30)
**Sect 2.2:**19. 29. 30. 47.**Sect 2.3:**15, 34, 35.**Sect 2.4:**31, 35, 37, 38.**Sect 2.5:**3, 5, 8, 11, 28. - (Due 2/6)
**Sect 2.6:**1, 3, 11, 29. - (Due 2/13)
**Sect 3.1:**35, 39. 53. 55.**Sect 3.2:**7, 14, 15, 28, 29. - (due 2/22)
**Sect 3.3:**1, 3, 13.**Sect 4.1:**7, 8, 33, 35, 36.**Sect 4.2:**1, 21(ab).**Sect 4.3:**5, 25(ace), 26(ace), 33, 39(adg).**Sect 4.4:**3, 5, 9, 11, 17, 27, 39.**Sect 4.6:**1, 11, 25, 27, 29. (For 25 and 27, no need of computing modular exponentials by calculators.) - (Due 3/6)
**Sect 5.1:**3, 9, 21, 27, 35.**Sect 5.2:**7.**Sect 6.1:**23, 25, 29.**Sect 6.2:**13, 15, 16, 22, 26, 27. - (Due 3/13)
**Sect 6.3:**17, 19, 23, 27, 33.**Sect 6.4:**3, 9, 22, 25.**Sect 6.5:**1, 3, 7, 11, 15(abc)**Sect 8.4:**1, 3(acde), 11, 23, 27, 33. - (Due 3/27)
**Sect 7.1:**17, 23, 37.**Sect 7.2:**3, 19, 23, 29. - (Due 3/29)
**Sect 7.3:**7, 13, 15.**Sect 7.4:**5, 11, 15, 19, 29, 35. - (Due 4/10)
**Sect 9.1:**5, 7.**Sect 9.3:**1(ac), 3(ac), 5, 7.**Sect 9.5:**3(bd), 9, 15, 21, 24. - (Due 4/17)
**Sect 10.1:**3, 5, 7, 9.**Sect 10.2:**5, 21, 23, 25, 29**Sect 10.3:**3, 5, 25, 26, 34, 37, 42, 45.**Sect 10.4:**5, 15(a), 29, 32, 34. - (due 4/19)
**Sect 10.4:**16, 17, 20, 50(ab), 55.**Sect 10.5:**5, 10, 30. - (Not required, and won't be in the exams)
**Sect 10.7:**5