### Boole’s Rings

- Jacob Davis, PhD 2016, Carnegie Mellon University May 2, 2016 Joel David Hamkins
- An equivalent formulation of the GCH April 30, 2016 Joel David Hamkins
- Same structure, different truths, Stanford University CSLI, May 2016 April 26, 2016 Joel David Hamkins
- The classical and generalized Laver tables can be computed quickly. April 25, 2016 Joseph Van Name
- Reverse Mathematics of Matroids April 22, 2016 Carl Mummert

### Comments on Boole’s Rings

- Comment on An equivalent formulation of the GCH by Joel David Hamkins May 2, 2016 Comments for Joel David Hamkins
- Comment on An equivalent formulation of the GCH by Christopher Brown May 2, 2016 Comments for Joel David Hamkins
- Comment on Jacob Davis, PhD 2016, Carnegie Mellon University by Joel David Hamkins May 2, 2016 Comments for Joel David Hamkins
- Comment on Jacob Davis, PhD 2016, Carnegie Mellon University by Rahman. M May 2, 2016 Comments for Joel David Hamkins
- Comment on An equivalent formulation of the GCH by Joel David Hamkins May 1, 2016 Comments for Joel David Hamkins

# Category Archives: Research

## Reverse Mathematics of Matroids

This post is about the paper Reverse Mathematics of Matroids by Jeff Hirst and me. We look at basis theorems for countable vector spaces, countable graphs, and countable enumerated matroids. These three kinds of structures turn out to be extremely … Continue reading

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## Talk on the existence of connected components of graphs

This week I am attending a seminar at Dagstuhl on Measuring the Complexity of Computational Content: Weihrauch Reducibility and Reverse Analysis. This post has slides from my talk and some blog-only remarks to expand on them.

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## Talk on Reverse Mathematics and the Modal Logic of Reverse Mathematics

This is a transcription of notes from a talk I gave on November 1, 2013 to the interdisciplinary logic seminar at the University of Connecticut. I gave a general introduction to Reverse Mathematics and then spoke about my work with … Continue reading

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## Internal combinatorics and uniform reducibility

This post is a set of notes from a talk I gave on December 5th for the discrete mathematics seminar at Marshall University. I want to argue that logical analysis can reveal the “internal combinatorics” of theorems, using some recent … Continue reading

Posted in Musings, Research, Talks
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## 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

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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