Math 140A, Fall 2020
Foundations of Real Analysis I


Announcements:


Course Information

Professor: Brandon Seward (pronouns: he/him/his)
Email: bseward@ucsd.edu
Lecture: MWF 11:00-11:50 via Zoom (navigate to https://ucsd.zoom.us/j/99316078691 or use Meeting ID 993 1607 8691)
Lecture Notes
Office Hours via Zoom: W 12:00 - 1:00 & 2:00 - 4:00 via Zoom (navigate to https://ucsd.zoom.us/j/99656671941 or use Meeting ID 996 5667 1941)
Office Hour Notes
Note: Office hours and lecture have different Meeting IDs!

Teaching Assistant: Srivatsa Srinivas (pronouns: he/him/his)
Email: scsriniv@ucsd.edu
A01 Discussion: Thurs. 6:00-6:50 via Zoom (navigate to https://ucsd.zoom.us/j/93036015847 or use Meeting ID 930 3601 5847)
A02 Discussion: Thurs. 7:00-7:50 via Zoom (navigate to https://ucsd.zoom.us/j/92301387495 or use Meeting ID 923 0138 7495)
Office Hours via Zoom (morning): M 8:00-9:00 AM and Th 8:00-9:00 AM (navigate to https://ucsd.zoom.us/j/98724904020 or use Meeting ID 987 2490 4020)
Office Hours via Zoom (evening): Tu 6:00-7:00 PM and W 6:00-7:00 PM (navigate to https://ucsd.zoom.us/j/95926070197 or use Meeting ID 959 2607 0197)

Course Descritption:
First course in a rigorous three-quarter sequence on real analysis. Topics include: the real number system, basic topology, numerical sequences and series, continuity.

Textbook: Principles of Mathematical Analysis by Walter Rudin, 3rd edition. We will cover Chapters 1 through 4 (excluding the appendix to Chapter 1).

Additional Study Materials: (you will not be tested on these)

Lecture:
Lecture will occur live on Zoom (use meeting ID: 993 1607 8691 or navigate to https://ucsd.zoom.us/j/99316078691). Videos of our lectures will be posted on our Canvas page under the Media Gallery tab. Additionally, the Lecture Notes I write in class will be updated shortly after each lecture.

Community Interaction: Typically meeting in the classroom allows students the opportunity to get to know one another and discuss the course material together. Since class meetings will not occur, as a substitute we have a discussion forum on Piazza that everyone is strongly encouraged to use. As part of their weekly office hours, the professor and teaching assistant will spend time each week responding to discussions on piazza (see above for specific hours). Our piazza page is here: https://piazza.com/ucsd/fall2020/math140a.

Homework: Homework will be assigned regularly and due on Fridays at 9:00 PM. No late homework will be accepted, but your lowest homework score will be dropped when computing your final grade. On each assignment, a few problems will be graded for correctness, while the others will be graded simply for completion. We will use Gradescope for turning in homework. When registering for gradescope, please register using your "@ucsd.edu" email address and use Entry Code D522XY.

Homework 1 (Due Friday Oct. 9): Chapter 1, problems 4, 5, 8, 9
Homework 2 (Due Friday Oct. 16): Chapter 1, problems 1, 6, 7, 13, 15, 17, 18
Hint: 6(d) is easier if in 6(c) you instead define B(x) to be the set of all b^t where t < x is rational. With this definition, 6(c) is harder to prove. To prove 6(c) with this definition apply 7(c).
Homework 3 (Due Friday Oct. 23): Chapter 2, problems 6, 7, 8, 9, 10, 11, and the following problem:
Problem A: Prove that the set of all injections from the set of natural numbers to itself is uncountable.
Homework 4 (Due Monday Nov. 2): Chapter 2, problems 12, 13, 14, 15, 17, 22, 29
Homework 5 (Due Friday Nov. 6): Chapter 2, problems 18, 19, 20, 21, and Chapter 3, problems 1, 2, 14(ab)
Homework 6 (Due Friday Nov. 13): Chapter 3, problems 3, 4, 5, 16(a), 20, 21, 22
Homework 7 (Due Friday Nov. 20): Chapter 3, problems 6, 7, 8, 9, 10, and the following problem:
Problem B: Let (a_n) be a sequence of real numbers. Prove that  ∑ a_n converges absolutely if and only if ∑ a_n b_n converges for every bounded sequence of real numbers (b_n).
Homework 8 (Due Friday Dec. 4): Chapter 4, problems 1, 2, 3, 4, 5
Homework 9 (Due Friday Dec. 11): Chapter 4, problems 6, 7, 14, 15, 17, 18
For problem 6 the metric on the graph of f is as follows: the distance from (x_1, f(x_1)) to (x_2, f(x_2)) is the sum of the distance from x_1 to x_2 plus the distance from f(x_1) to f(x_2).

Exams: The midterm exams will be taken at home and solutions will be uploaded to Gradescope. The exams will be open-book and open-note, but the use of online resources and help from other humans is forbidden. If cheating is suspected, students will be required to have a one-on-one zoom meeting where students will have to solve similar problems and/or comment on their exam solutions.
Grading: Your final grade will be the maximum of the following two weighted averages:
Special Accommodations: Students requiring accommodations should provide an OSD letter of certification and OSD accommodation recommendation to the instructor as soon as possible.


Course Schedule (items in gray may change)

Week
Monday
Wednesday
Friday
0


October 2
Ordered sets
1
October 5
Fields
October 7
Fields
The Real field
October 9 (HW 1 Due)
The Real field
The extended Real number system

The Complex field

2
October 12
The Complex field
Euclidean spaces
October 14
The Complex Field, Euclidean spaces
Finite, countable, and uncountable sets
October 16 (HW 2 Due)
Finite, countable, and uncountable sets
Metric spaces
3
October 19
Metric spaces
October 21
Compact sets
October 23 (HW 3 Due)
Compact sets
4
October 26
Perfect sets
Review for midterm

October 28
First Midterm (Eastern, Western)
Practice A (solutions)
Practice B (solutions)
October 30
Connected sets
Convergent sequences

5
November 2 (HW 4 Due)
Convergent sequences
Subsequences

Cauchy sequences
November 4
Cauchy sequences
Upper and lower limits

November 6 (HW 5 Due)
Upper and lower limits
Some special sequences
Series

6
November 9
Series
Series of non-negative terms
The number e

November 11
Veterans Day
November 13 (HW 6 Due)
The number e
The Root and Ratio Tests

7
November 16
Power series
Summation by parts
Absolute convergence

November 18
Addition and multiplication of series
Rearrangements

November 20 (HW 7 Due)
Rearrangements
Limits of functions

8
November 23
Limits of functions
Review
November 25
Second Midterm (Eastern, Western)
Practice A (solutions)
Practice B (solutions)
November 27
Thanksgiving Holiday
9
November 30
Continuous functions
December 2
Continuous functions
Continuity and compactness
December 4 (HW 8 Due)
Continuity and compactness
Continuity and connectedness

10 December 7
Discontinuities
Monotonic functions
December 9
Monotonic functions
Infinite limits and limits at infinity
December 11 (HW 9 Due)
Reveiew
11
Tuesday December 15, 11:30AM-2:30PM
Final Exam
Practice A (solutions), Practice B (solutions)