Michele Torielli (Hokkaido), On the freeness of arrangements associated to gain graphs
Toby Johnson (CUNY College of Staten Island), The frog model on trees
Eduardo Cattani (UMass), preseminar: Introduction to Matroids, slides: Log-concave Sequences and Polarized Frobenius Algebras (work of Adiprasito, Huh, and Katz)
Mathieu Dutour Sikiric (Institut Rudjer Boskovic)
Sam Hopkins (MIT) notes from the talk