Let M, be set of all rare subsets of a metric space X. Prove that countable union of M, is rare.

Elements Of Modern Algebra
8th Edition
ISBN:9781285463230
Author:Gilbert, Linda, Jimmie
Publisher:Gilbert, Linda, Jimmie
Chapter7: Real And Complex Numbers
Section7.1: The Field Of Real Numbers
Problem 2TFE: Label each of the following statements as either true or false. Every upper bound of a nonempty set ...
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Let M, be set of all rare subsets of a metric space X. Prove that countable union of M, is rare.
Prove that a non-empty subset S of a Hilbert space X is total if and only if S+ = {0}.
%3D
Transcribed Image Text:Let M, be set of all rare subsets of a metric space X. Prove that countable union of M, is rare. Prove that a non-empty subset S of a Hilbert space X is total if and only if S+ = {0}. %3D
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