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リロード規制です。10分ほどで解除するので、他のブラウザへ避難してください。
471: 現代数学の系譜 雑談 ◆e.a0E5TtKE 2019/10/27(日)20:15 ID:EUeYkluT(1/4) AAS
これ、なかなか面白いわ(^^
https://mathoverflow.net/questions/273292/where-did-zermelo-first-model-the-natural-numbers-by-iterates-of-the-singleton-o
MathOverflow
Where did Zermelo first model the natural numbers by iterates of the singleton operator, and have the definitions been compared by himself? asked Jun 29 '17 at 15:32 Peter Heinig
472
(1): 現代数学の系譜 雑談 ◆e.a0E5TtKE 2019/10/27(日)20:54 ID:EUeYkluT(2/4) AAS
ほいよ

https://scholarpublishing.org/sse/
Services for Science and Education Ltd
https://scholarpublishing.org/sse/wp-content/uploads/2018/08/10.14738tnc.092018.1_global-set-theory_2018.pdf
Satoko Titani
Global Set Theory
Society for Science and Education (United Kingdom)

Dedicated to Professor Gaisi Takeuti (1925 ? 2017)

Contents
1 Basic set theory 11
1.1 Naive set theory . . . . . . . . . . . . . . . . . . . . . . . . . . 11
1.2 Formal system of set theory . . . . . . . . . . . . . . . . . . . 16
1.2.1 Gentzen’s formal system of logic . . . . . . . . . . . . . 17
1.2.2 Inference rules of LK and LJ . . . . . . . . . . . . . . . 18
1.2.3 Axioms of set theory . . . . . . . . . . . . . . . . . . . 22
1.3 Construction of mathematics in ZFC . . . . . . . . . . . . . . 24
1.3.1 Definition of sets . . . . . . . . . . . . . . . . . . . . . 24
1.3.2 Ordered pairs . . . . . . . . . . . . . . . . . . . . . . . 25
1.3.3 Relations . . . . . . . . . . . . . . . . . . . . . . . . . 25
1.3.4 Functions . . . . . . . . . . . . . . . . . . . . . . . . . 26
1.3.5 Equivalence relation . . . . . . . . . . . . . . . . . . . 26
1.3.6 Natural numbers . . . . . . . . . . . . . . . . . . . . . 27
1.3.7 Operations on the natural numbers . . . . . . . . . . . 32
1.3.8 Ordinals . . . . . . . . . . . . . . . . . . . . . . . . . . 39
1.3.9 Integer . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
1.3.10 Rational number . . . . . . . . . . . . . . . . . . . . . 42
1.3.11 Real number . . . . . . . . . . . . . . . . . . . . . . . . 43
1.3.12 Complex number . . . . . . . . . . . . . . . . . . . . . 44
1.3.13 Universe of ZFC . . . . . . . . . . . . . . . . . . . . . . 44
473
(1): 現代数学の系譜 雑談 ◆e.a0E5TtKE 2019/10/27(日)23:44 ID:EUeYkluT(3/4) AAS
>>472 補足

https://scholarpublishing.org/sse/global-set-theory/
Services for Science and Education Ltd
Global Set Theory
Satoko Titani
Professor Emeritus of Chubu University, Japan.

Our reasoning is based on dichotomous logic. That is, we are naturally convinced that a statement is either true or false exclusively. We accept the dichotomy as axiom.
The dichotomous logic is a language of mathematics in which science is described. Set theory, which is the base of mathematics, is formulated into a formal system of a logic with set theoretical axioms. A logic provided with globalization or basic implication is called a global logic.
A set theory based on the global logic is called a global set theory. Global set theory comprehends the meta-theory of set theory.
By introducing the globalization into a set theory, we can express the truth value set and also express the universe of the set theory in the set theory. That is, global set theory is nested in the global set theory.
It follows that we can prove the completeness of global set theories such as lattice valued set theory and quantum set theory.
Logical science is founded on the base of global classical logic. Each classical statement is either true or false, and these outcomes are mutually exclusive. Thereby, the global classical theory determines true-or-false definitely.
The logical science gives us very fruitful information, even though it covers only a bounded aspect of nature that falls within the realm of logic. We see that our logic is not absolute and is in fact determined by the establishment of a truth value set, which depends on object world.
Nature in its entirety is far beyond the scope of logic. Therefore, logical science is unable to describe the entire natural universe, in the same way as a net is unable to scoop up everything in its path.

DOI: 10.14738/tnc.092018.1
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474: 現代数学の系譜 雑談 ◆e.a0E5TtKE 2019/10/27(日)23:52 ID:EUeYkluT(4/4) AAS
>>473 補足の補足

https://researchmap.jp/read0174593/?lang=japanese
研究者氏名
千谷 慧子
チタニ サトコ
所属
旧所属 中部大学 工学部 理学教室
職名
教授
学位
理学博士(東京大学), 理学修士
学歴
テキストで表示
- 1965年
東京大学 数物系研究科 数学
- 1957年
東京大学 理学部 数学科

https://link.springer.com/article/10.1023%2FB%3AIJTP.0000005977.55748.e4
International Journal of Theoretical Physics
November 2003, Volume 42, Issue 11, pp 2575?2602| Cite as
Quantum Set Theory
Authors and affiliations
Satoko TitaniHaruhiko Kozawa
Springer Nature Switzerland AG
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