Spring 2021

Mathematical Reasoning and Proof

Listed in: Mathematics and Statistics, as MATH-220

Formerly listed as: MATH-15


Michael C. Ching (Section 01)
Ivan Contreras (Section 02)


This course serves as an introduction to mathematical reasoning and pays particular attention to helping students learn how to write proofs. The topics covered may include logic, elementary set theory, functions, relations and equivalence relations, mathematical induction, sequences, and quantifiers. Additional topics may vary from semester to semester. Four class hours per week.

MATH 220 will be online-only, and will involve a variety of online and offline activities, including all-class Zoom meetings, small group sessions, individual office hours and problem sets. Students will be expected to engage fully with the course material, and with each other, both during live video meetings and via online discussion forums. Alternative arrangements will be made for students in time zones that make attending specific meetings difficult, or who have other challenges with doing work for the course online. Students who are on-campus may be able to carry out some of the small group work in-person.

Limited to 25 students. The Department. 

If Overenrolled: Preference will be given to sophomores


Online Only, Quantitative Reasoning, Science & Math for Non-majors


2022-23: Not offered
Other years: Offered in Spring 2010, Spring 2011, Fall 2018, Spring 2019, Fall 2019, Spring 2020, Fall 2020, Spring 2021, Fall 2021, Spring 2022