Logic Blog 2021

Abstract

ContentsPart 1. Group theory and its connections to logic 1. Berdinsky and Nies: Abelian groups of rank 2 2. Lupini and Nies: Extensions of abelian groups 3. Nies: questions on groups and logic Part 2. Metric spaces and descriptive set theory 4. Melnikov: Polish metric spaces and t.d.l.c. groups Part 3. FA-presentable structures 5. IMS workshop, problem session on FA-presentable structures Part 4. Set theory 6. Yu: Some consequences of Turing determinacy and strong Turing determinacy 7. Yu: On the Hausdorff dimension of Hamel bases. Part 5. Mathematical logic and quantum mechanics 8. Nies: The spectral gap problem for spin chains References