[過去ﾛｸﾞ] 純粋・応用数学 (1002ﾚｽ)
上下前次1-新
抽出解除 ﾚｽ栞

---

このｽﾚｯﾄﾞは過去ﾛｸﾞ倉庫に格納されています｡
次ｽﾚ検索 歴削→次ｽﾚ 栞削→次ｽﾚ 過去ﾛｸﾞﾒﾆｭｰ

---

58(1): 現代数学の系譜 雑談 ◆e.a0E5TtKE 2020/03/31(火)11:13 ID:YIE+6BeO(5/6) AAS
>>57
＞超現実数体が実係数ハーン級数（英語版）体（各級数の和の値は超現実数として解釈する）に順序体として同型となることを証明した

外部ﾘﾝｸ:en.wikipedia.org
Hahn series
(抜粋)
In mathematics, Hahn series (sometimes also known as Hahn?Mal'cev?Neumann series) are a type of formal infinite series.
They are a generalization of Puiseux series (themselves a generalization of formal power series) and were first introduced by Hans Hahn in 1907[1] (and then further generalized by Anatoly Maltsev and Bernhard Neumann to a non-commutative setting).
They allow for arbitrary exponents of the indeterminate so long as the set supporting them forms a well-ordered subset of the value group (typically {Q} or {R} ).
Hahn series were first introduced, as groups, in the course of the proof of the Hahn embedding theorem and then studied by him as fields in his approach to Hilbert's seventeenth problem.

Contents
省8

---

59: 現代数学の系譜 雑談 ◆e.a0E5TtKE 2020/03/31(火)11:48 ID:YIE+6BeO(6/6) AAS
>>58 関連

英語のページが、実に充実しているね
外部ﾘﾝｸ:ja.wikipedia.org
形式的冪級数
外部ﾘﾝｸ:en.wikipedia.org
Formal power series
(抜粋)
Contents
1 Introduction
2 The ring of formal power series
省32

---

上下前次1-新書関写板覧索設栞歴

---

ｽﾚ情報 赤ﾚｽ抽出 画像ﾚｽ抽出 歴の未読ｽﾚ AAｻﾑﾈｲﾙ

---

ぬこの手 ぬこTOP 0.197s*