Daniel Halpern-Leistner is an Associate Professor in the Department of Mathematics at Cornell University. He received his Ph.D. in 2013 from the University of California, Berkeley. His academic interests focus on Analysis and Topology, with a research emphasis on Algebraic Geometry, Homological Algebra, Mathematical Physics, and Representation Theory. His work primarily explores the moduli problem, a central concept in algebraic geometry that deals with the properties of geometric objects defined as solutions to systems of polynomial equations, dependent on parameterization. Halpern-Leistner's research incorporates modern methodologies into classical subjects, utilizing tools such as the theory of algebraic stacks, derived algebraic geometry, and homological algebra. His main project delves into the extension of the classical subject of geometric invariant theory, applying general machinery to questions surrounding derived categories and the D-equivalence conjecture. He has authored publications in prominent journals, including the Journal of the American Mathematical Society.