Dear friends: There are two math colloquia this week: Tuesday, 3:30 PM at zoom link: https://okstate-edu.zoom.us/j/93298136222?pwd=VTg4c2xuRG4wMExKVFJwSWp1LzBPQT... Sümeyra Sakalli, University of Arkansas Exotic 4-manifolds and complex surfaces, algebraic fibrations, singularities and knots Abstract is attached to this message, which has a QR code for the Zoom link. Friday, 3:30 PM at Zoom link: https://okstate-edu.zoom.us/j/98083413777?pwd=aGtRckVTOTgzV2xucGdPNGE1ZmNVdz... Serin Hong, Simons Laufer MSI/University of Michigan p-adic Geometry - A Grand Junction of Mathematics Abstract attached to this message. Hope to see you there, David Wright