Let O denote the collection of all open subsets of the real line R. Prove that there is a smallest o-algebra B such that O C B. (By saying B is the smallest o-algebra with this property, we mean that if B' is any other o-algebra with this property, then B' 2 B.)

Elements Of Modern Algebra
8th Edition
ISBN:9781285463230
Author:Gilbert, Linda, Jimmie
Publisher:Gilbert, Linda, Jimmie
Chapter6: More On Rings
Section6.1: Ideals And Quotient Rings
Problem 24E: 24. If is a commutative ring and is a fixed element of prove that the setis an ideal of . (The set...
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Let O denote the collection of all open subsets of the real line R. Prove
that there is a smallest o-algebra B such that O C B. (By saying B
is the smallest 0-algebra with this property, we mean that if B' is any
other o-algebra with this property, then B' 2 B.)
Transcribed Image Text:See below picture: Let O denote the collection of all open subsets of the real line R. Prove that there is a smallest o-algebra B such that O C B. (By saying B is the smallest 0-algebra with this property, we mean that if B' is any other o-algebra with this property, then B' 2 B.)
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