### Boole’s Rings

- Brace(s) yourself April 19, 2018 Peter Krautzberger
- Infinite Sudoku and the Sudoku game April 17, 2018 Joel David Hamkins
- Conjugacy for homogeneous ordered graphs April 12, 2018 Samuel Coskey
- Kameryn J. Williams, PhD 2018, CUNY Graduate Center April 8, 2018 Joel David Hamkins
- Open Problems! April 8, 2018 Asaf Karagila

### Comments on Boole’s Rings

- Comment on Math for nine-year-olds: fold, punch and cut for symmetry! by Joel David Hamkins April 19, 2018 Comments for Joel David Hamkins
- Comment on Math for nine-year-olds: fold, punch and cut for symmetry! by Jen April 19, 2018 Comments for Joel David Hamkins
- Comment on Infinite Sudoku and the Sudoku game by Joel David Hamkins April 17, 2018 Comments for Joel David Hamkins
- Comment on Infinite Sudoku and the Sudoku game by Joel David Hamkins April 17, 2018 Comments for Joel David Hamkins
- Comment on Infinite Sudoku and the Sudoku game by Infinite Sudoku and the Sudoku game – Nevin Manimala’s Blog April 17, 2018 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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