Extended Set Operations and Indexed Families of Sets Let A be a family of sets. The union over A is J A = {x : x ∈ A for some
![elementary set theory - Union and Intersection is Associative/Family of Sets - Mathematics Stack Exchange elementary set theory - Union and Intersection is Associative/Family of Sets - Mathematics Stack Exchange](https://i.stack.imgur.com/L4HX4.png)
elementary set theory - Union and Intersection is Associative/Family of Sets - Mathematics Stack Exchange
![SOLVED: Suppose we have a collection of sets (an indexed family) Ai | i ∈ I; all subsets of some universal set U. We define its intersection and union as follows: Ai = SOLVED: Suppose we have a collection of sets (an indexed family) Ai | i ∈ I; all subsets of some universal set U. We define its intersection and union as follows: Ai =](https://cdn.numerade.com/ask_images/020aac6f4b7546a38baef26a7d7d9487.jpg)
SOLVED: Suppose we have a collection of sets (an indexed family) Ai | i ∈ I; all subsets of some universal set U. We define its intersection and union as follows: Ai =
![Null set, Family of sets, Indexed Family of sets||Set theory|| topology for msc mathematics - YouTube Null set, Family of sets, Indexed Family of sets||Set theory|| topology for msc mathematics - YouTube](https://i.ytimg.com/vi/wleZ3ItRvdE/sddefault.jpg)