Recorded 26 October 2021. Matthew Choptuik of University of British Columbia Physics presents "Multi-oscillating Boson Stars" at IPAM's Workshop II: Mathematical and Numerical Aspects of Gravitation. Abstract: General-relativistic boson stars are stationary, gravitationally bound configurations of a complex scalar field, with or without an self-interaction potential. They are characterized by an oscillation frequency for the scalar field which arises as an eigenvalue in the set of ODEs which define the stationary state. I discuss evidence that these stars are actually a subset of configurations which oscillate with a potentially infinite number of incommensurate frequencies. I present explicit calculation of two-frequency states and summarize the similarities and differences of these configurations with the single-frequency stars. Learn more online at: https://www.ipam.ucla.edu/programs/workshops/workshop-ii-mathematical-and-numerical-aspects-of-gravitation/?tab=schedule