Equivalents of the (Weak) Fan Theorem
Equivalents of the (Weak) Fan Theorem
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(弱)范定理的等价物
DOI:
10.1016/j.apal.2004.07.002
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发表时间:
2005
期刊:
影响因子:
--
通讯作者:
I. Loeb
中科院分区:
文献类型:
--
作者:
I. Loeb
This article presents a weak system of intuitionistic second-order arithmetic, WKV, a subsystem of the one in S.C. Kleene, R.E. Vesley [The Foundations of Intuitionistic Mathematics: Especially in Relation to Recursive Functions, North-Holland Publishing Company, Amsterdam, 1965]. It is then shown that some statements of real analysis, like a version of the Heine–Borel Theorem, and some statements of logic, e.g. compactness of classical proposition calculus, are equivalent to the (Weak) Fan Theorem in this system.