### Boole’s Rings

- Some thoughts about teaching introductory courses in set theory September 21, 2017 Asaf Karagila
- The set-theoretic universe is not necessarily a class-forcing extension of HOD September 19, 2017 Joel David Hamkins
- Equivalence relations and classification problems, parts 1 and 2 September 19, 2017 Samuel Coskey
- On the classification of automorphisms of trees September 11, 2017 Samuel Coskey
- The hierarchy of second-order set theories between GBC and KM and beyond September 9, 2017 Joel David Hamkins

### Comments on Boole’s Rings

- Comment on Some thoughts about teaching introductory courses in set theory by Harto Saarinen September 24, 2017 Comments for Asaf Karagila
- Comment on Some thoughts about teaching introductory courses in set theory by Dan Saattrup Nielsen September 23, 2017 Comments for Asaf Karagila
- Comment on Some thoughts about teaching introductory courses in set theory by Joseph Van Name September 22, 2017 Comments for Asaf Karagila
- Comment on Every countable model of set theory embeds into its own constructible universe by Incomparable $omega_1$-like models of set theory | Joel David Hamkins September 19, 2017 Comments for Joel David Hamkins
- Comment on Local properties in set theory by Neil Barton September 18, 2017 Comments for Joel David Hamkins

# Author Archives: Carl Mummert

## An incompleteness theorem for β_{n} models

My first paper was “An incompleteness theorem for $\beta_n$ models” with Stephen Simpson [1]. It’s a short paper, but the idea is very pretty. We know that the incompleteness theorem implies there are strange models of arithmetic, but these models … Continue reading

Posted in Papers, Research
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## AMS/ASL Special Session on Alan Turing

I arrived home yesterday from the 2012 Joint Mathematics Meetings in Boston, where I was a co-organizer of the AMS/ASL Special Session on the Life and Legacy of Alan Turing. The talks were wonderful, and the session went very smoothly, … Continue reading

Posted in Meetings
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## The logic of Reverse Mathematics

This post is about a research idea I have been thinking about which is quite different from my usual research. It’s an example of a project with an “old fashioned” feel to it, as if it could have been studied … Continue reading

## Moving to WordPress

For a while I have been thinking about migrating to a content management system for my web page. Previously I had a script I wrote that was essentially a simply wiki to let me edit pages from any web browser … Continue reading

Posted in Math on the web
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