### Boole’s Rings

- Generalizations of Laver tables Abridged posted! March 21, 2017 Joseph Van Name
- Stationary preserving permutations are the identity on a club March 20, 2017 Asaf Karagila
- Ternary Laver table calculator (now with a local and a global calculator) March 16, 2017 Joseph Van Name
- overlay journals March 16, 2017 Peter Krautzberger
- Computable processes which produce any desired output in the right nonstandard model March 15, 2017 Victoria Gitman

### Comments on Boole’s Rings

- Comment on All triangles are isosceles by Joel David Hamkins March 13, 2017 Comments for Joel David Hamkins
- Comment on All triangles are isosceles by Spring Beauty (@SpringBeautyDJ) March 12, 2017 Comments for Joel David Hamkins
- Comment on All triangles are isosceles by Joel David Hamkins March 11, 2017 Comments for Joel David Hamkins
- Comment on Buckets of fish! by Buckets of Fish and Defeating Hydras | Mike's Math Page March 11, 2017 Comments for Joel David Hamkins
- Comment on All triangles are isosceles by Spring Beauty (@SpringBeautyDJ) March 11, 2017 Comments for Joel David Hamkins

# Category Archives: Papers

## 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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## 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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