| 11. | Contemporary research in set theory includes the study of large cardinals and determinacy.
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| 12. | The resulting axiom is now part of the standard axioms of set theory.
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| 13. | Research into higher-order computability theory demonstrated its connections to set theory.
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| 14. | It is important in effective descriptive set theory and recursion theory.
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| 15. | Classical descriptive set theory includes the study of regularity properties of Borel sets.
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| 16. | According to naive set theory, any definable collection is a set.
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| 17. | The development of classes mirrors the development of naive set theory.
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| 18. | Gamer has been credited with early contributions to diatonic set theory.
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| 19. | Robinson explored such areas as logic, set theory, complex analysis and number theory.
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| 20. | SierpiDski edited the journal, which specialized in papers on set theory.
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