Question: Exercise 1.1. Show that the following two classes are fields, but not o-fields. (a) All finite subsets of R together with their complements. (b) All

Exercise 1.1. Show that the following two classes are fields, but

Exercise 1.1. Show that the following two classes are fields, but not o-fields. (a) All finite subsets of R together with their complements. (b) All finite unions of intervals in R of the form (a, b], (-oo, a], and (b, co)

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