There are regular seminars in analysis, mathematical physics, group theory, number theory/algebraic geometry, combinatorics, logic, and geometry/topology. The mathematical physics seminar has active participation of mathematical physicists from various universities in the Los Angeles area. Additionally, there are seminars, held jointly with UCLA, in Number Theory and in Logic. Also of interest is the string theory/conformal field theory seminar run in the physics department and the seminars in the Control Dynamical Systems and Applied Mathematics at Caltech. Options, as well as the Institute-wide theory seminar, workshops, research conferences, and regional seminars are held periodically in many of the above areas.

The department colloquium takes place on Tuesday afternoon.