Learn about quiver varieties in this 2-hour 24-minute mathematical physics seminar from OpenBITP. Explore the completion of ordinary quiver varieties, study symplectic quotients, and understand the Kempf-Ness theorem connecting them to GIT quotients. Delve into the geometric foundations leading to the definition of Nakajima varieties, a key concept in mathematical physics. Join the OpenBITP mathematical physics community to stay updated on future seminars through their Google Groups mailing list.