About us

We are the Mathematics Undergraduate Student Association of the University of California, Berkeley!

We strive to improve the overall quality of studying mathematics here as an undergraduate, especially by advocating for issues that benefit the entire undergraduate math community, not only the subset that attends our events.

Joining MUSA is an excellent way to connect with other math enthusiasts. You can learn about the many opportunities for math students, including little tricks that will help you survive the rigorous math curriculum here.

We have academic, outreach, and professional groups working to provide services to math undergraduates, including our Math Monday lecture series, Shadow a Math Major Day, and our biannual alumni panel. Our office, 938 Evans, is also usually open, selling hoodies and food — but we encourage students to come in just to chat about math or life. We won't bite!

New to Spring 2018, we've begun the Berkeley Undergraduate Mathementoring Program, where lower division students can get wisdom from juniors and seniors as well as become more involved in the Berkeley math community. We've also started a seminar, MUSA 74, for students who want to learn more about writing proofs as they take Math 104 and Math 113.

We encourage students to come to our Thursday events, held in 1015 Evans, where you can meet fellow math geeks and get valuable information.

Most annoucements are done over MUSA's mailing list.

Join our mailing list!

Weekly Events

We hold events every week throughout the semester. Typically, our events are held at 6pm-8pm at Evans 1015, the top floor lounge of Evans Hall. Our upcoming events can be seen in the calendar.

Math Monday


An introduction to ordinal analysis

26 February, 2018 — 939 Evans

Hilbert's Program was an early twentieth century research program with two goals: (i) axiomatize mathematics and (ii) prove the consistency of the axioms by indubitable means. Interest in Hilbert's Program waned after Gödel's discovery that, roughly, no interesting axiomatic theory can be proved consistent on the basis of indubitable means. This discovery sowed the seeds for a refined version of Hilbert's Program known as ordinal analysis. In ordinal analysis, the strength of axiomatic theories is measured and compared by determining what principles are necessary and sufficient for proving their consistency. I will provide a non-technical introduction to the subject with no background knowledge assumed.

Featured Problem


Homeomorphism classes in Rn

Prerequisite: Math 104

We say that two subsets, X and Y, of Rn are homeomorphic if there is a continuous bijection from X to Y whose inverse is also continuous.

Show that there exist two subsets of Rn which are not homeomorphic, but do have continuous bijections between them.


Have any questions? Email us at musa@math.berkeley.edu or visit our office at 938 Evans Hall. You might also check out our Facebook group.

Send us a message!