Instructor Lecture Time (MWF) Location
Yuming Paul Zhang B00

Piazza page for Math 109 Lecture B
Enroll yourself!

Textbook Information

The required textbook for the course is An Introduction to Mathematical Reasoning, by Peter J. Eccles; published by Cambridge University Press. The textbook can be found: You might need to use UCSD library VPN to gain the access off campus.
The homework problems are mainly coming from the textbook. Please solve the problems on your own. We will not be using online homework for this course.


The lecture videos are stored in google drive; the link can be found in the announcement in Canvas. You might need to use your UCSD gmail account to view it.

Office Hours

Zoom office hour: MWF 10-11 am (Link will be sent through emails)
(We are going to use Zoom for the office hour. Please download it.)

TAs' Information and Disscussion Sections

Bingni Guo
Office hour:

Exam Information

  There will be two midterm exams and a final exam. Check the Course Calendar for the dates of the exams.

Exam 1: Jan 24 2020 (Friday/45 minutes) — Topics included are those from Weeks 1-3.
Exam 2: Feb 21 2020 (Friday/45 minutes) — The focus will be on topics from Weeks 4-7.
Final: Mar 20 2020 (Friday/3 hours) — The final exam is cumulative and includes every topic from the course.

  • The Exams are open book ONLINE exams.
  • No calculators or electronic devices may be used during the examinations, except for the use of writing solutions and uploading the works.

Links to old Math 109 exams and solutions appear below.

Final Exam:

Make-up Exams:  Make-up exams will not be given, nor will we offer exams at an alternate time. If you miss a midterm exam for any reason, then your course grade will be computed using Method 2. (See below.)

Grading:  There are two methods to determine your course grade:

Your grade will be computed using both methods and then the better grade will be used. After your weighted average is calculated, letter grades will be assigned based on the standard grading scale:

A+ A A- B+ B B- C+ C C- D F
[99,100] [93,99) [90,93) [87,90) [83,87) [80,83) [77,80) [73,77) [70,73) [60,70) [0,60)

There will be no curve, but we may adjust the scale to be more lenient (depending on the performance of the class). While we may adjust the scale to be more lenient, we guarantee that the grade corresponding to a given percentage will not be lower than specified by the above scale.

Please notice that outside factors, including the need for a certain grade for admission/retention in any academic program, scholarship or transfer credit, graduation requirements or personal desire for a specific grade DO NOT appear in the above calculations, and thus are not considered in any way in the determination of your course grade. Effort, improvement, class attendance and participation will all dramatically improve your grade in the course in that they will allow you to do well on quizzes, exams, and the final exam. They will NOT, however, actively participate in the calculation of your course grade.

Gradescope: Homeworks and Exams grading will be done using an online tool called Gradescope ( Exams will be scanned and uploaded to Gradescope and will be graded within it. As a consequence, exams will not be returned to the students. Instead, a digital version of your exams will be made available after the grading has been completed. An email will be sent from Gradescope when the exams are made available.

Regrades:  Regrade requests will be made using the built-in regrade request feature in Gradescope. There will be a limited window of time after the exams are made available during which the regrade request feature will be active. This time window will be announced when the exam scores are released to the students. We don't consider any regrade request during at the end of the quarter.

Academic Dishonesty:  Academic dishonesty is considered a serious offense at UCSD.  Students caught cheating will face an administrative sanction which may include suspension or expulsion from the university.  It is in your best interest to maintain your academic integrity. (Click here for more information.)