Math 109, Sec B
UCSD Spring 2022
MWF 11–11:50am (RCLASS)
Mathematical Reasoning

Brett Kolesnik
Office hours (starting Wed Apr 6): Mon and Wed 11am–12pm (Meeting ID: 968 9565 0064)

*** Please email the instructor about confidential matters only. All other questions (about lectures, homework, etc) should be posted on Piazza. Note that you get credit (5% overall) for your activity on Piazza. ***

Jesse Kim
Office hours (starting week 2): Tues and Thurs 2–4pm in 2022 APM.

The password for all Zoom meetings, class materials, etc. has been sent to all students through Canvas and Piazza. (If you cannot find this message, then please email the instructor to obtain the password.)

Math 109 uses a variety of topics in mathematics to introduce rigorous mathematical proof. This course is required of all departmental majors and is worth 4 credit hours.

Math 18 or Math 20F or Math 31AH, and Math 20C. Students who have not completed these prerequisites may enroll with consent of the instructor.

Remote Format
Math 109 (Sec B) is fully remote. Office hours will be held on Zoom. Lectures will be prerecorded (asynchronous). There will be 5 "class mixers" held on Zoom throughout the term during the scheduled lecture time 11–11:50am. Attendance at these events is required. There will also be 5 quizzes held remotely during the scheduled lecture time 11–11:50am. *** You MUST be available during 11–11:50am on all of these dates (see under "Important Dates" below for the schedule) in order to enroll in Math 109 (Sec B). ***

An Introduction to Mathematical Reasoning: numbers, sets and functions,
by Peter J. Eccles
Available for FREE through the UCSD library (use VPN if not on campus)


Discussions (starting Thurs, Apr 7)
Weekly discussion sessions will be held by the TA. Students that regularly attend and actively participate in these sessions tend to do better in the class overall. Attendance is optional, but highly encouraged. Students enrolled in Sec B01 should attend on Thursdays during 12–12:50pm. Students in Sec B02 should attend on Thursdays during 1–1:50pm. You may occasionally attend the other session without emailing the TA for permission.
  1. (Sec B01) Thursdays 12–12:50pm in APM 2301
  2. (Sec B02) Thursdays 1–1:50pm in APM 2301
8 homework assignments will be posted throughout the term. All assignments must be uploaded to Gradescope by 11pm.

5 quizzes will be held remotely during 11am–12pm. All Quizzes will be 50 minutes + 10 minutes to upload. Quizzes must be uploaded to Gradescope by 12pm.

Class Mixers
5 "class mixers" will be held on Zoom during 11–11:50am. Attendance is mandatory. These interactive meetings will be graded based on attendance and participation.

All class announcements will be made through Piazza (not Canvas). Therefore it is very important that you check Piazza regularly for announcements.

Submit all assessments through Gradescope.

An "optional assignment" will appear on Gradescope for each homework assignment and each quiz. If you upload detailed corrections (explain all errors that you made, and present a new correct solution to each part of each question that you did not get 100% correct) for a homework assignment or quiz, then you will receive a 1 point bonus on this assessment. All optional assignments are due by 11pm Thurs, Jun 9.

Homework and Quiz Drops
If you complete the optional assignment for all homework assignments, then your lowest homework score will be replaced by your final exam score (if this is higher than your lowest homework score). Likewise, if you complete the optional assignment for all quizzes, then your lowest quiz score will be replaced by your final exam score (if this is higher than your lowest quiz score).

Academic Integrity
You may discuss homework with your fellow classmates, but you must write up your own solution in your own words. You must work completely alone on all quizzes and the final exam. Cases of academic dishonesty will be reported to the Academic Integrity Office. Penalties vary depending on the circumstances, but can include failure in the course or suspension from the university.

Late/Waived Assessments
Late work or missed work will not be excused, except for legitimate reasons (such as serious illness, family emergency, etc). Please email the instructor if any such circumstances arise.

OSD Accommodations
Students requesting accommodations for this course due to a disability must provide a current Authorization for Accommodation (AFA) letter (paper or electronic) issued by the Office for Students with Disabilities. Please note that students are required to discuss accommodation arrangements with the instructor and OSD liaisons in the department in advance of any exams or assignments.

Additional Resources
Discussion section schedule
Academic calendar
Enrollment and registration calendar
Academic Integrity Office
Office for Students with Disabilities

Important Dates

  1. Mon, May 30: Memorial Day (no lecture)
  2. Fri, Apr 22: deadline to drop without "W" on transcript
  3. Fri, May 6: deadline to drop with "W" on transcript
Homework (due by 11pm on Gradescope)
  1. Fri, Apr 8 sol
  2. Fri, Apr 15 sol
  3. Fri, Apr 22 sol
  4. Wed, Apr 27 sol
  5. Wed, May 4 sol
  6. Wed, May 11 sol
  7. Wed, May 25 sol
  8. Wed, Jun 1 sol  

Class Mixers (on Zoom during 11–11:50am)

  1. Mon, Apr 11 (Meeting ID: 920 7284 7911)
  2. Mon, Apr 25 (Meeting ID: 915 9206 5530)
  3. Fri, May 6 (Meeting ID: 980 5569 0407)
  4. Fri, May 20 (Meeting ID: 954 7111 1316)
  5. Wed, Jun 1 (Meeting ID: 945 1869 9362)

Quizzes (posted at 11am, due by 12pm on Gradescope)

  1. Mon, Apr 18 (§1–5) sol
  2. Fri, Apr 29 (§6–9) sol
  3. Fri, May 13 (§10–14) sol
  4. Fri, May 27 (§15–18) sol
  5. Fri, Jun 3 (§23) sol 

Final Exam (posted at 11:30am, due by 2:30pm on Gradescope)

  1. Fri, Jun 10 (cumulative, all §1–18 and §23)

A tentative schedule appears below, but is subject to change slightly throughout the term. (You might find it helpful to read/skim through a section of the text before watching the corresponding lecture video. This is not required, of course, but may find it to be a very effective learning strategy.)

*** All lecture videos and slides are available in Canvas (click on "Media Gallery"). Click on "Attachments" under a video to download the slides.