$\omega_1$-like models of PA
The City University of New York
I will give a brief survey of what is known about $omega_1$-like models of PA (much) and what is not known (much).
Roman Kossak is professor of mathematics at The City University of New York, at Bronx Community College and also at the CUNY Graduate Center. He conducts research in mathematical logic, especially in model theory of Peano Arithmetic.