Abstract: It is known that there exist many "non-smoothable 4-manifolds", that is, topological 4-manifolds which do not admit smooth manifold structures. Gauge theory provides a strong tool to detect such interesting topological 4-manifolds. In this talk, I will explain a family version of this story. Namely, I will show that a family version of gauge theory may detect "non-smoothable 4-manifold bundles", which is a fiber bundle whose structure group is the homeomorphism group of a 4-manifold, but we cannot reduce the structure group into the diffeomorphism group. This is joint work with David Baraglia and with Tsuyoshi Kato and Nobuhiro Nakamura.

Prof. Jae-Hyung Jeon, Department of Physics, POSTECH, Korea

Ludvig Lizana, Senior lecturer (associate professor) at Department of Physics, Umea University.

Dr. Jack (John B.) Sculley, Dr., Fellow of the University of California, Berkeley, Museum of Paleontology, Fellow of the National Tropical Botanical Gardens, Fellow of the Centre for Palaeoclimatology Research, Ritsumeikan University, Founder and Director of the Archipelago Center for Science and Sustainability.

Speaker: Dr. Andreas Ruschhaupt (Lecturer, University College Cork, Ireland)

Language: English

Katarzyna Bozek, Group Leader (Stephens Unit)

Joint Math and Theoretical physics seminar on Chern-Simons theory, Knot invariants and Volume conjecture. Vyacheslav Lysov will be leading the discussion.

[Internal Seminar Series]

Speaker: Dr. Thomas van de Kamp, Laboratory for Applications of Synchrotron Radiation, Karlsruhe Institute of Technology (KIT), Germany

【Seminar】Controlling Proteins and Organelles with Zapalog and Light by Dr. Amos Gutnick,
Harvard Medical School / Boston Children's Hospital -May 14th @ C210 (Center Bldg, Level C)