- 著者
-
田中 一之
- 出版者
- 日本科学哲学会
- 雑誌
- 科学哲学 (ISSN:02893428)
- 巻号頁・発行日
- vol.40, no.2, pp.13-21, 2007-12-25 (Released:2009-05-29)
- 参考文献数
- 20
Reverse Mathematics is an ongoing research program on foundations of mathematics, whose aim is to find out what kinds of logical or set-theoretical hypotheses are necessary and sufficient to prove a theorem of ordinary mathematics. In this paper, we show that the fundamental theorem of algebra holds within RCA0, a weakest base theory of this program, by way of a combination of a nonstandard method and a conservation result on weak König's lemma.