Table of contents

  1. Course Info
  2. Realistic Prerequisites
  3. Subject Matter
  4. Course Staff
  5. Lectures
  6. Problem Sets
  7. Exams
  8. Resources
  9. Grading
  10. Advice to Future Students

Course Info

Class Size 10
Hours/Week 9.9 (7 responses)
Instructors Paul Alfred Seidel
# of Responses to Course 18 Underground Questions 5/10

Realistic Prerequisites

  • Content from 18.905 was very important. The material from 18.905 was quickly reviewed in the first few lectures.
  • Knowing some differential geometry was useful as well. Sometimes, algebraic geometry appeared, but was not necessary for the class.

Subject Matter

  • The class was purely theoretical. However, the material was focused on geometry rather than category theory.

Course Staff

  • Approachable, and willing to help students.
  • Encouraged participation in lectures.


  • Lectures have a fast pace.
  • Could use lecture notes, textbook, and other references to learn about material.

Problem Sets

  • 10 problem sets, around 5 problems per problem set.
  • Interesting and challenging problems which could be done with knowledge from lectures.


  • No exams.


  • For each lecture, there were lecture notes and a list of parts of textbooks containing the material.
  • No required textbook.


  • Lenient and fair, the distribution of grades was transparent.
  • Grades were determined by average of 10 problem sets.
  • The A/B/C cutoffs were 80/65/50.

Advice to Future Students

  1. “Consider who the professor will be when taking this class. This will likely determine how geometric or how category theory based the class is.”