matthias beck

MATH 730: Theory of functions of a complex variable Spring 2026

Class meetings	Mondays & Wednesdays 12:30-1:45 p.m. Thornton Hall 404
Prerequisites:	MATH 470/770 with a grade of C or better or consent of the instructor
Instructor	Dr. Matthias Beck
Office	Thornton Hall 933
Office hours	Mondays 10-11, Wednesdays 11-12, by appointment, and via zoom

Course objectives. Our goal is to study the development of functions in one complex variable. We will look at concepts of real-variable functions and see which of these concepts and their accompanying theorems can be transferred into the complex realm, which have to be modified, and which don't exist in the world of complex numbers. We will see that there are concepts and theorems in all of these three categories.

Syllabus. Topics in this course will include:

• Power series & analytic functions
• Maximum principle
• Complex integration & Cauchy's theorem
• Conformal maps & harmonic functions
• Residue calculus

Textbook.

• Donald E. Marshall, Complex Analysis, Cambridge, 2019. [Errata]

I will keep a brief diary here which sections we covered each week and the homework:

• Week 1: Chapter 1, Section 2.1. Homework: 1.3, 1.6, 1.7, 1.8, 1.9, 2.2. Turn in 1.6, 1.7(b), 1.8(a).

The math. The way to learn math is through doing math. One doesn't become a good piano player by listening to music, and one doesn't learn how to shoot free throws by watching basketball games. Similarly, you don't learn mathematics by watching someone else do mathematics. You will be doing a lot of the math in this course. It is vital and expected that you attend every class meeting. You will get a good feel for the math from there, but it is even more crucial that you do the homework. Working in groups is not only allowed but strongly recommended.

Axioms & first principles. Our class is based on Federico Ardila's Axioms:

1. Mathematical potential is distributed equally among different groups, irrespective of geographic, demographic, and economic boundaries.
2. Everyone can have joyful, meaningful, and empowering mathematical experiences.
3. Mathematics is a powerful, malleable tool that can be shaped and used differently by various communities to serve their needs.
4. Every student deserves to be treated with dignity and respect.

I would emphasize within the last axiom that dignity and respect is also something you should treat yourself to, and that every person in our course, students and professor, are expected to be honest. It is likely that some or all of us will experience challenges and disruptions this semester. Please choose to act with compassion for others and for yourself as we navigate any situations that arise.

Human connectivity. Our class relies heavily on human interaction (among students and between students and the professor). I expect you to be present and engaged in every class session, work with classmates, and share your ideas as part of our course community. Research shows that use of cell phones, laptops, and other devices causes distraction and impairs learning not only for the person using the technology but also for people nearby. Consequently, you may not use technology use of this kind during class sessions. (If you have accommodation needs around technology that have been registered with DPRC, please let me know.)

Homework & AI policy. I will assign homework problems as we go through the material. The main point of homework is for you to continuously flex and strengthen your math muscles. You may (and should) work together with your class mates. You may not search the internet or use AI tools for solutions to problems; we will use our creativity, course text, and peer collaboration as our tools: we will learn math by doing math. (AI is often factually wrong, and it is also deeply problematic, e.g., perpetuating misogyny and racial and cultural biases.)

We can discuss the homework problems at any time during class, and you can hand in (or bring to my office hours) any of your solutions for feedback. The homework problems from any given week will be due before the following Wednesday class. You can either bring your homework to class or send me a pdf copy via email (please use your first name as file name).

SageMath. You are welcome to use the open math software sage in some of your homework assignments. Here is a good introduction to sage.

Grading system. In our course, we will use a specifications-based assessment and grading system, which has the following key features:

• There are four elements to assessment and grading: participation, homework, and exams with definition and problem sections.
• There are no points and no partial credit; all assignments will be either be given a pass or an incomplete. This grade, for each problem, will be based on a combination of (a) correctness of the solution and (b) quality of communication in your writing.
• Your class grade will be determined by the amount of course material you have passed, with the benchmarks to achieve each letter grade specified below. By focusing on learning and mastery instead of accruing partial credits, we can keep our attention focused on what we know and where we need to improve.
• You can revise some of your incomplete work. My goal is for each of you to develop as mathematical thinkers, learners, and collaborators. To support this goal, you are allowed to revise and resubmit selected work during the semester.

The four elements of assessment and grading are as follows.

• Participation: I expect you to be present and engaged every class session. Every student begins the semester with a participation grade of 20 and will lose one point for each unexcused absence.
• Homework: On non-exam Wednesdays, you will submit three homework problems, assigned the previous week. You will be allowed to revise and resubmit them (once) by the following Wednesday.
• Exams: we will have three cumulative exams, on
  • 4 March (in class)
  • 15 April (in class)
  • 20 May (12:30-2:30 pm)
  Each of the first two exams will consist of three complex analysis definitions with examples and three problems similar to the homework; the last exam will have five definitions/examples and five problems. You will be allowed to revise and resubmit selected problems (once) within a week of when I return your work.

To earn a particular grade in the class, you need to complete all of the benchmarks in the column corresponding to that grade in the table below; i.e., if the entry lists x then you need to receive a pass grade on x of those items to earn the corresponding column grade.

	A	B	C	D
Participation (out of 20)	17	15	13	11
Homework (out of 36)	31	26	21	16
Definition exams (out of 11)	9	8	6	5
Problem exams (out of 11)	8	6	5	4

The Canvas site for our course has instructions how you can check your progress at any point. I want to ensure that each of you accomplishes the goals of this course as comfortably and successfully as possible. At any time you feel overwhelmed or lost, please come and talk with me.

Important deadlines are posted in the academic calendar.

Disability access. SF State welcomes the opportunity to support students with disabilities requiring accommodations. Students with disabilities who need accommodations should contact the Disability Programs and Resource Center (DPRC) as soon as possible, and are encouraged to let me know that I will be contacted by the DPRC. The DPRC is available to facilitate the accommodations process in consultation with the student and me. The DPRC is located in the Student Service Building, Room 110, and can be reached by telephone (voice/415-338-2472, video phone/415-335-7210) or by email.

Student disclosures of sexual violence. SF State fosters a campus free of sexual violence including sexual harassment, domestic violence, dating violence, stalking, and/or any form of sex or gender discrimination. If you disclose a personal experience as an SF State student, I am required to notify the Title IX Coordinator. To disclose any such violence confidentially, contact:

• The SAFE Place - (415) 338-2208
• Counseling & Psychological Services Center - (415) 338-2208

For more information on your rights and available resources click here.

Academic integrity and plagiarism. Academic integrity, the ethical presentation of one's own work in accordance with the rules established for this class, is required. Instances of academic misconduct will be reported to the College in which the course is housed, the Division of Graduate Studies (if a graduate student), and the Office of Student Conduct with the report being kept in those offices until a student earns their degree. Any instances of cheating, deceit, fabrication, forgery, plagiarism, unauthorized altering of records or submitting false documents, unauthorized collaboration, unauthorized submission of work previously given credit, or other forms of academic misconduct will be assigned a grade penalty, likely a grade of zero. Failing one or more assignments or examinations for reasons of academic integrity violations may result in a final class grade of F. Students may not withdraw from classes in which they have committed academic misconduct. Consequences for violations of academic integrity may exceed an F on the assignment, examination, or class as determined by the Academic Integrity Review Committee.

Members of our academic community have a responsibility to develop an awareness of academic integrity, to cultivate skills to realize honesty in academic and community work, and to sustain actively academic honor as a core value of our community. Students are expected to engage in behaviors that reflect well upon the university. In addition to attending to one's own actions, the Standards for Student Conduct require that students who witness academic dishonesty notify their faculty/instructor, department chair, or the Office of Student Conduct. Supporting academic integrity enhances the reputation of the university and the value attributed to degrees awarded by the university.

Course content capturing. Students may not capture audio, photos or video from class sessions on their own devices without the explicit permission of the instructor and everyone present, unless part of a DPRC-authorized accommodation. Students may not post any course materials to any third-party sites or post any recordings, screenshots, audio or chat transcripts in any setting outside the class. Violations of this policy are subject to student disciplinary action.

CR/NCR grading. Most Mathematics classes allow CR/NCR grading, but many majors--including Mathematics--do not count CR/NCR grades towards the major. Mathematics majors should not take their Mathematics classes CR/NCR. All other majors should check with their academic advisors before deciding to take a Mathematics class CR/NCR. If--after checking with your advisor--you want to apply for CR/NCR grading, you should log onto this web site and sign up for CR/NCR grading before the deadline. I will not pass out a CR/NCR sheet in class.

Incomplete grades. The Incomplete grade (I) is assigned only to students doing satisfactory work until the last few weeks of a course, when events beyond the students' control prevented them from completing the course. If this happens to you, please discuss with me the possibility of taking an Incomplete rather than withdrawing from a class that you cannot finish. If you would like me to consider an Incomplete, be proactive: approach me as soon as you realize you will not be able to finish the class, and be prepared to present me with a plan how you intend to make up your Incomplete.

Late and retroactive withdrawals. Petitions for withdrawal from a class after the deadline, either before the end of the semester (late withdrawal) or after the semester ends (retroactive withdrawal) must be justified by events that occurred after the deadline. In general, only petitions for withdrawal from all courses will be approved. Late withdrawal from your math course alone is usually not approved.

This syllabus is subject to change. I will try to keep this course web page as updated as possible, however, the most recent information will always be given in class. If you miss a class, it is your responsibility to find out what's going on. Always ask lots of questions in class; my courses are interactive. You are always encouraged to see me in my office.