General Information

      Unique ID: 55149 and 55150

      Instructor: Dave Rusin ( 
      Office hrs: I will hold both live and online office hours:
         I will be in my office (PMA 9.140) Wednesdays noon-2pm
         I will be available by Zoom Tuesdays 11am-12:15, at this URL:
      I can also arrange additional times to meet; send me email if 
      you'd like to meet with me.

      Text: Introduction to Real Analysis, 4th Ed., by Bartle and Sherbert

      This is a "hybrid" course: you can participate online at
      or in the classroom PMA 7.104 for an authentic meet-your-professor experience!
      Class meets T, Th from 2pm - 3:30pm. 

      Please note the time of your final exam:
        Tuesday, May 18, 2:00 pm-5:00 pm
      There is no provision for taking the final exam earlier or later,
      and you must take the exam with the rest of your section.

Course webpage: It is unlikely that I will post any important material to Canvas; for any additional information I want to give you outside of class, you should come to this webpage, right in this next section:

EXAM 1, due Wednesday 3/3 at 3:30. EXAM 2, due Wednesday 4/14 at 11:59pm


1. The class is currently waitlisted. If you are trying to enroll, you will have to wait -- I cannot and will not allow students into the class except those who enrol through the online system or through the advising office (PMA 4.101). If you are in the class but think you might drop, please try to decide promptly: there are students who are eager to take your place soon if you don't intend to keep it.

I will put up homework assignments here:

    HW1, Due Jan 28 HW2, Due Feb 04 HW3, Due Feb 11 HW4, Due Feb 23 HW5, Due Mar 30 HW6, Due Apr 13

Catalogue Description


Either consent of mathematics advisor, or two of M341, 328K, 325K (Philosophy 313K may be substituted for M325K), with a grade of at least C-. May not be counted by students with credit for M365K with a grade of C or better.

Graded material

Your semester grade will be based on a number of components. This structure is designed to encourage you to stay actively involved in the course all the way through the semester. Any adjustments to the schedules or policies will be announced multiple times in lecture and via email and on the course website shown above.

Homework: There will be homework due weekly. I will drop the lowest homework grade and average the rest to give you a "Homework Score" of up to 100 points for the semester.

Exams: There will be 2 mid-term exams, to be held during the usual class period, and a comprehensive final exam.

Because my exams tend to be hard, I have a way to curve the exam scores. I will compute both your raw score and your curved score and whichever is higher for you will be the score I use when computing semester grades. The curving method is simple: I compute the mean, mu, and the standard deviation, sigma, of the class's raw scores, and then a person with a raw score of X will get a curved score of

   85 + 10 (X-mu) / sigma
(with a maximum curved score of 105). This way the mean curved score will be 85 and the standard deviation of the curved scores will be 10. In effect, a person with the average grade gets a "B", and the person whose exam grade is higher or lower by one standard deviation gets an "A" or a "C".

Textbooks, notes, and electronic devices (including phones and calculators) are not permitted during exams. The penalty for violating these conditions is a score of ZERO on the exam.

I expect the dates of the midterms to be February 23 and April 8 but this is subject to change. The last day of class is May 7. Please mark on your calendars now the time and date of the final exam.

Semester grades: Your numerical grade for the semester is a weighted average of the components above, specifically it is the dot product

 < 0.30, 0.20, 0.20, 0.30 > . < HW, T1, T2, Final >
This number is converted to a letter grade according to the following scale: Just kidding. I use a pretty standard conversion formula:
97.0-100 A+
0 -59.9F


Class meetings: Our "lecture" meeting times together are very short so we must make the most of them. If you participate remotely, log in daily, with all the materials you need to take notes and work problems. Sit at a desk or table with something to write with. If possible, please choose a distraction-free environment and connect to the Zoom session with your camera on and your microphone off. (Why your camera should be on: )

I usually can't follow the chat box during the lecture. You should feel free to interrupt me directly! I will usually see a raised-hand icon if you activate it, but I don't mind at all if you simply speak up. (Within reason, of course.)

I am grateful to have the assistance of the Liberal Arts ITS crew, who --- at least at the beginning of the semester when we are completely online --- will be in a recording engineer's booth to give our classes a bit of a professional look. They will record each day's class and save it to Canvas, under the "Lectures Online" link. (Recordings appear later in the day.) I expect that I will be able to continue providing recordings after we move to a hybrid mode.

Class Recordings: Class recordings are reserved only for students in this class for educational purposes and are protected under FERPA. The recordings should not be shared outside the class in any form. Violation of this restriction by a student could lead to Student Misconduct proceedings.

LAITS have also set up the Online Course Tech Support tab on the navigation panel; you may go there to get help for any technical issues you have that may prevent you from accessing materials on your Canvas course. (You will initially be greeted by an AI chatbot which can answer most questions, but if not you will be connected with a live support representative from LAITS.)

I would like to have breakout sessions in which students can discuss things in small groups. It would help reduce the noise level if students who come to the classroom and still log in to Zoom would use a headset with a microphone. (Those students must also practice appropriate pandemic-prevention manners.)

Attendance is not mandatory. But who are we kidding? We're going to work through the entire textbook in just 30 class meetings. At the pace of this class, any time you miss a class, you are at least a whole section behind! That's hard to make up. Plus, if you are (to take a common example) paying in-state tuition for 12 undergraduate credit-hours, the tuition alone costs you $71 for every one of those 40 class meetings. Are you really going to throw away $71 you have already paid, so that you can turn off Zoom and take a nap?

Covid safety: Per university rules and public health guidelines, every student must wear a cloth face-covering properly in class and in all campus buildings at all times, maintain social distancing, and stay home if showing symptoms. Don't be a jerk: we ALL want this pandemic to end!

Piazza: There is a tab in Canvas that takes you to Piazza, a discussion forum for the students in the class. This is a good place to ask questions when class is not in session. Other students can answer your question(s) when they log in. I will try to visit the forum occasionally to help out with the discussion (and in particular I may need to improve some student answers a bit for accuracy or clarity).

Make-ups: It is in general not possible to make up missing quizzes or homework assignments after the due date. If you believe you will have to miss a graded event, please notify me in advance; I will try to arrange for you to complete the work early.

Students with disabilities: The University of Texas at Austin provides upon request appropriate academic accommodations for qualified students with disabilities. For more information, contact the Office of the Dean of Students at 471-6259, 471-4641 TTY.

Religious holidays: If you are unable to participate in a required class activity (such as an exam) because it conflicts with your religious traditions, please notify me IN ADVANCE and I will make accommodations for you. Typically I will ask you to complete the required work before the religious observance begins.

Academic Integrity. Please read the message about Academic Integrity from the Dean of Students Office. I very much prefer to treat you as professionals whose honesty is beyond question. But this has proven difficult, especially with students taking exams remotely. I have reported students to the Dean for cheating and they have had to bear the consequences; I will do so again if I must. Don't be that person!

Campus safety: Please familiarize yourself with the Emergency Preparedness instructions provided by the university's Campus Safety and Security office. In the event of severe weather or a security threat, we will immediately suspend class and follow the instructions given. You may wish to sign up with the campus alert programs.

Counseling: Students often encounter non-academic difficulties during the semester, including stresses from family, health issues, and lifestyle choices. I am not trained to help you with these but do encourage you to take advantage of the Counselling and Mental Health Center, Student Services Bldg (SSB), 5th Floor, open M-F 8am-5pm. (512 471 3515, or

Add dates: If you enroll within the first four class days of the semester, and have missed any graded material, I will adjust the weighting of your graded sections accordingly so that you are not penalized. No such accommodation is made for students who enroll on the 5th day or later. (Such students must enroll through the MPAA advising center in PMA, and ordinarily I do not admit students who ask to enroll then if they have missed any graded activities).

Drop dates: Jan 22 is the last day to drop without approval of the department chair; Feb 3 is the last day to drop the course for a possible refund; Apr 5 is the last day an undergraduate student may, with the dean's approval, withdraw from the University or drop a class except for urgent and substantiated, nonacademic reasons. For more information about deadlines for adding and dropping the course under different circumstances, please consult the Registrar's web page,

Sharing of Course Materials is Prohibited: No materials used in this class, including, but not limited to, lecture hand-outs, videos, assessments (quizzes, exams, papers, projects, homework assignments), in-class materials, review sheets, and additional problem sets, may be shared online or with anyone outside of the class unless you have my explicit, written permission. Unauthorized sharing of materials promotes cheating. It is a violation of the University’s Student Honor Code and an act of academic dishonesty. I am well aware of the sites used for sharing materials, and any materials found online that are associated with you, or any suspected unauthorized sharing of materials, will be reported to Student Conduct and Academic Integrity in the Office of the Dean of Students. These reports can result in sanctions, including failure in the course.


We have a LOT to do this semester --- we'll work through the entire book together! So expect to fly through about three sections every week.


You may have spent most of your mathematical life working on problems by yourself. This is a good thing; you become self-reliant. However, I strongly encourage you to work with one or two other students in this class on a regular basis. Challenge each other to solve the problems, to explain the concepts, and to ask each other for help. This is the way mathematics is done in the real world, and practicing this now can help you this semester and beyond.

Since you are adults, I leave it to you to monitor your level of understanding on your own, and to seek help when you need it. But please allow me to share my experience. Every student who starts this class has met the pre-requisites and has the expectation that he or she will succeed. Nonetheless, every semester, a nontrivial fraction of this group of bright, hard-working students ends up with a D or F, or withdraws. No one likes this outcome. Please be attentive to your progress on homeworks and quizzes and midterms. If you find you are always asking other people for help while studying; if you find that it takes you hours and hours to complete every homework set; if your quiz grades are low, or you score less than half the possible points on a midterm exam: in these cases, you CAN succeed, but ONLY if you change your patterns immediately. Optimism is a wonderful thing but it alone cannot bring the results you may want. Please see me early in the semester if you think you may have trouble during this course. I can try to help you with the material, or with your study habits, or else advise you to withdraw. Let's make this the first-ever 100% successful Math 427L class!

One more suggestion: have fun this semester! Some of us think math is so cool that we end up doing it for a living. I will try to convey to you some of what's kewl, and invite you to consider majoring (or minoring) in math, joining the math club, or simply taking more math classes. In my office I am always happy to talk about mathematics topics beyond what we discuss in class.