Reverse Mathematics 2001

1. Possible ra-diagrams of models of arithmetic 2. Weak theories of nonstandard arithmetic and analysis 3. Notions of compactness in weak subsystems of second order arithmetic 4. Proof-theoretic strength of the stable marriage theorem and other problems 5. Free sets and reverse mathematics 6. Interpreting arithmetic in the r.e. degrees under Z4-induction 7. Reverse mathematics, Archimedean classes, and Hahn’s Theorem 8. The Baire category theorem over a feasible base theory 9. Basic applications of weak Konig’s lemma in feasible analysis 10. Maximal nonfinitely generated subalgebras 11. Metamathematics of comparability 12. A note on compactness of countable sets 13. A survey of the reverse mathematics of ordinal arithmetic 14. Reverse mathematics and ordinal suprem 15. Did Cantor need set theory? 16. Models of arithmetic: Quantifiers and complexity 17. Higher order reverse mathematics 18. Arithmetic saturation 19. WQO and BQO theory in subsystems of second order arithmetic 20. Reverse mathematics and graph coloring: Eliminating diagonalization 21. Undecidable theories and reverse mathematics 22. II1 sets and models of WKLo 23. Manipulating the reals in RCA0 24. Reverse mathematics and weak systems of 0-1 strings for feasible analysis