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Subsystems of Second Order Arithmetic

Stephen G. Simpson

出版	Cambridge University Press, 2009-05-29
主題	Mathematics / Logic
ISBN	11394789159781139478915
URL	http://books.google.com.hk/books?id=qP5zxgRQo4cC&hl=&source=gbs_api
EBook	SAMPLE

註釋

Almost all of the problems studied in this book are motivated by an overriding foundational question: What are the appropriate axioms for mathematics? Through a series of case studies, these axioms are examined to prove particular theorems in core mathematical areas such as algebra, analysis, and topology, focusing on the language of second-order arithmetic, the weakest language rich enough to express and develop the bulk of mathematics. In many cases, if a mathematical theorem is proved from appropriately weak set existence axioms, then the axioms will be logically equivalent to the theorem. Furthermore, only a few specific set existence axioms arise repeatedly in this context, which in turn correspond to classical foundational programs. This is the theme of reverse mathematics, which dominates the first half of the book. The second part focuses on models of these and other subsystems of second-order arithmetic.