Preface / Yongbin Ruan and Nathan Priddis -- Quasimaps and some examples of stacks for everyone / Rachel Webb -- Introduction to the gauged linear sigma model / Emily Clader -- Localization and mirror symmetry / Dustin Ross -- A brief introduction to cosection localization and p-fields / Wei-Ping Li -- Virtual classes for hypersurfaces via two-periodic complexes / Mark Shoemaker -- Localized Chern characters for 2-periodic complexes and virtual cycles / Jeongseok Oh -- Singularity theory and mirror symmetry / Todor Milanov -- Arithmetic mirror symmetry and hypergeometric structures / Ursula Whitcher -- Variations on the theme of quantum Lefschetz / Honglu Fan and Yuan-Pin Lee -- Extremal transitions and quantum D-modules / Rongxiao Mi -- A lecture on holomorphic anomaly equations and extended holomorphic anomaly equations / Chiu-Chu Melissa Liu.