Tuesday, November 5, 2019

Tuesday, November 5, 2019 — 2:00 PM EST

Luke MacLean, Department of Pure Mathematics, University of Waterloo

"Reverse Mathematics"

We say that $S \subseteq \mathcal{P}(\omega)$ is an $\omega$-model of a subsystem of second order arithmetic if the $L_2$ structure $(\omega, S, +, \cdot, 0, 1, <)$ correctly models the subsystem in question. The goal of this lecture will be to prove that there is an $\omega$-model of $WKL_0$ consisting entirely of low sets. 

This will involve learning about PA degrees and the low basis theorem.

All are welcome.

MC 5413

Tuesday, November 5, 2019 — 2:30 PM EST

Andrej Vukovic, Department of Pure Mathematics, University of Waterloo

We continue where last week's discussion left off by discussing the classification of semivaluations in the valuative tree. Then we return to our study of plane polynomial dynamics.

M3 3103

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