Concreteness From Pedagogy to Brown Representability

Watch a 56-minute Topos Institute Berkeley seminar where Kevin Arlin explores two compelling case studies in making abstract mathematical concepts concrete. Learn how 3D graphics can replace traditional pedantic abstraction in teaching sophisticated geometric group theory to high school students, enabling genuine mathematical thinking. Discover how careful examination of a specific transfinite sequence of spaces helped resolve fundamental confusion in homotopy theory foundations, demonstrating the power of concrete visualization in advanced mathematics research.