P( |Bn) = 1.n=112. Suppose C is a class of subsets of 2 and suppose B C2 satisfies BE o (C).Show that there exists a countable class CB C C such that B E O(CB).Hint: DefineG := {BC N:3 countable CB CC such that Be o(CB)}.Show that G is a o-field that contains C.13 IE LD

let 'G' be the union of all σ-algebras generated by countable subsets of CB.

12. Suppose C is a class of subsets of 2 and suppose BC satisfies B e o(C). Show that there exists a countable class CR C C such that Be o(CB). Hint: Define G := {BC N:3 countable CB CC such that Beo (CB)}. Show that G is a o-field that contains C.

12. Suppose C is a class of subsets of 2 and suppose BC satisfies B e o(C). Show that there exists a countable class CR C C such that Be o(CB). Hint: Define G := {BC N:3 countable CB CC such that Beo (CB)}. Show that G is a o-field that contains C.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

P( |Bn) = 1.
n=1
12. Suppose C is a class of subsets of 2 and suppose B C2 satisfies BE o (C).
Show that there exists a countable class CB C C such that B E O(CB).
Hint: Define
G := {BC N:3 countable CB CC such that Be o(CB)}.
Show that G is a o-field that contains C.
13 IE LD

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