Math 201A: Real Analysis

Professor: Katy Craig, katy•craig at ucsb • edu

Lecture: Tuesday and Thursday, 11am-12:15pm, Building 387, Room 1015

Office Hours: Monday and Friday 2-3pm and by appointment.

Schedule change:
• Craig office hours: Monday 9/25, 2:30-3:30pm on zoom (see Discord for link and password)
• Class lecture: Tuesday 9/26, 11am-12:15pm on zoom (see Discord for link and password)
Textbook: Folland, Real Analysis: Modern Techniques and Their Applications, second edition

Other Recommended References:

Exams: There will be two midterms and one final exam. The examinations will be closed book and closed note. There will be no retaking or rescheduling exams under any circumstances, as the grading scheme allows you to drop your lowest midterm score.

  • First Midterm: Tuesday, October 25th, 11am-12:15pm
  • Second Midterm: Thursday, November 17th, 11am-12:15pm
  • Final Exam: Wednesday, December 7, 12-3pm


  • Homework will be due Mondays at 11:59pm.
  • Assignments will be posted on this website and submitted via Gradescope.
  • Only problems marked with an asterisk (*) should be submitted for grading.
  • At least one problem on each of the exams will be chosen from the non-asterisked homework problems.
  • No late homework will be accepted.
  • The lowest two homework grades will be dropped and will not count toward the final grade.
  • Regarding collaboration/Google:
    • The solutions to most homework problems can be found on the internet. The purpose of homework is to practice solving problems. Don’t miss out on that practice, or you will deprive yourself of key preparation for the exams.
    • Discussing homework problems with classmates is an excellent way to learn the material. However, be aware that it's easy to overestimate how much you actually understand when you work in a group.

Participation: Participation will be based on attendance during lecture. If you have personal circumstances that make it difficult for you to attend lecture, please contact me within the first two weeks of classes to make an alternative arrangement.

Grading Scheme:

  • Participation: 5%, Homework: 30%, Highest of Two Midterm Grades 30%, Final 35%
  • All regrade requests must be received within two weeks after the graded work is returned.
  • This is a core course for MATH and STSAP graduate students. Grades of A- or better will mean that you are performing at the Ph.D. level. Grades of B and B+ indicate performance at the MA level.

Prerequisites: undergraduate level real analysis, similar to UCSB 118abc

Outline of Course:

Part I: Measures Part II: Integration
sigma-algebras measurable functions
measures integration of functions
outer measures modes of convergence
Lebesgue measure product measures

Weekly Plan:
topic reading due today notes/review materials
1 Sept 22 (Th) introduction to measures 1.1 LEC1
2 Sept 27 (T) sigma-algebras (I) 1.2 HW1, HW1tex LEC2
3 Sept 29 (Th) sigma-algebras (II)
4 Oct 4 (T) measures (I) 1.3
5 Oct 6 (Th) measures (II)
6 Oct 11 (T) outer measures (I) 1.4
7 Oct 13 (Th) outer measures (II)
8 Oct 18 (T) Borel measures on the real line (I)
9 Oct 20 (Th) Borel measures on the real line (II) 1.5
10 Oct 25 (T) first midterm, over lectures 1-9
11 Oct 27 (Th) measurable functions (I) 2.1
12 Nov 1 (T) measurable functions (II)
13 Nov 3 (Th) integration of nonnegative functions (I) 2.2
14 Nov 8 (T) integration of nonneg. functions (II) 2.3
15 Nov 10 (Th) integration of real valued functions (I)
16 Nov 15 (T) integration of real valued functions (II)
17 Nov 17 (Th) second midterm, over lectures 11-16 2.4
18 Nov 22 (T) modes of convergence (I) (online lecture)
19 Nov 29 (T) modes of convergence (II)
20 Dec 1 (Th) modes of convergence (III)
Dec 7 (W) final exam, 12-3pm

Acknowledgements: I would like to thank Chuck Akemann and Davit Harutyunyan for sharing their materials from previous sessions of math 201A at UCSB. I would also like to acknowledge Eric Carlen (Rutgers) and Brian White (Stanford), from whom I learned measure theory. I have referred the materials from their courses in preparing this one.