Algebras of sets and combinatorics
著者
書誌事項
Algebras of sets and combinatorics
(Translations of mathematical monographs, v. 214)
American Mathematical Society, c2002
- タイトル別名
-
Алгебры множеств и комбинаторика
Algebry mnozhestv i kombinatorika
大学図書館所蔵 全35件
  青森
  岩手
  宮城
  秋田
  山形
  福島
  茨城
  栃木
  群馬
  埼玉
  千葉
  東京
  神奈川
  新潟
  富山
  石川
  福井
  山梨
  長野
  岐阜
  静岡
  愛知
  三重
  滋賀
  京都
  大阪
  兵庫
  奈良
  和歌山
  鳥取
  島根
  岡山
  広島
  山口
  徳島
  香川
  愛媛
  高知
  福岡
  佐賀
  長崎
  熊本
  大分
  宮崎
  鹿児島
  沖縄
  韓国
  中国
  タイ
  イギリス
  ドイツ
  スイス
  フランス
  ベルギー
  オランダ
  スウェーデン
  ノルウェー
  アメリカ
注記
Bibliography: p. 251-253
Includes index
内容説明・目次
内容説明
An algebra $A$ on a set $X$ is a family of subsets of this set closed under the operations of union and difference of two subsets. The main topic of the book is the study of various algebras and families of algebras on an abstract set $X$. The author shows how this is related to famous problems by Lebesgue, Banach, and Ulam on the existence of certain measures on abstract sets, with corresponding algebras being algebras of measurable subsets with respect to these measures. In particular it is shown that for a certain algebra not to coincide with the algebra of all subsets of $X$ is equivalent to the existence of a nonmeasurable set with respect to a given measure.Although these questions don't seem to be related to mathematical logic, many results in this area were proved by 'metamathematical' methods, using the method of forcing and other tools related to axiomatic set theory. However, in the present book, the author uses 'elementary' (mainly combinatorial) methods to study properties of algebras on a set. Presenting new and original material, the book is written in a clear and readable style and illustrated by many examples and figures. The book will be useful to researchers and graduate students working in set theory, mathematical logic, and combinatorics.
目次
Introduction Main results The main idea Finite sequences of algebras (1). Proof of Theorems 2.1 and 2.2 Countable sequences of algebras (1). Proof of Theorem 2.4 Proof of the Gitik-Shelah theorem, and more from set theory Proof of Theorems 1.17, 2.7, 2.8 Theorems on almost $\sigma$-algebras. Proof of Theorem 2.9 Finite sequences of algebras (2). The function $\mathfrak{g}(n)$ A description of the class of functions $\Psi_*^7$ The general problem. Proof of Theorems 2.15 and 2.20 Proof of Theorems 2.21(1,3), 2.24 The inverse problem Finite sequences of algebras (3). Proof of Theorems 2.27, 2.31, 2.36, 2.38 Preliminary notions and lemmas Finite sequences of algebras (4). Proof of Theorems 2.39(1,2), 2.45(1,2) Countable sequences of algebras (2). Proof of Theorems 2.29, 2.32, 2.46 A refinement of theorems on $\sigma$-algebras. Proof of Theorems 2.34, 2.44 Semistructures and structures of sets. Proof of Theorem 2.48 Final comments. Generalization of Theorem 2.1 Appendix: On a question of Grinblat by S. Shelah Bibliography Index.
「Nielsen BookData」 より