Explore the fourth lecture in a series on phase-field models for motion by mean curvature, delivered by Professor Panagiotis Souganidis from the University of Chicago. Delve into advanced mathematical concepts as part of the International School on Extrinsic Curvature Flows. Gain insights into the latest developments in this field of study, building upon the foundations laid in previous sessions. Engage with complex theories and applications related to phase-field modeling and mean curvature motion, presented by a leading expert in the field.