en.wikipedia.org/wiki/Union_(set_theory)

In set theory, the union (denoted by ∪) of a collection of sets is the set of all
elements in the ... Since sets with unions and intersections form a Boolean
algebra, ...

www.khanacademy.org/math/statistics-probability/probability-library/basic-set-ops/v/intersection-and-union-of-sets

Sal shows examples of intersection and union of sets and introduces some set
notation.

www.themathlab.com/geometry/section2/union and intersection.htm

The UNION of two sets is the set of elements which are in either set. For example:
let A = (1,2,3) ... The INTERSECTION of A and B, written A intersection B = (3).

www.sparknotes.com/math/algebra1/compoundinequalities/section2.rhtml

A summary of Union and Intersection of Sets in 's Compound Inequalities. Learn
exactly what happened in this chapter, scene, or section of Compound ...

mbaker.columbiastate.edu/algebratips_pages/union and intersection.htm

Union and Intersection. The intersection and union of sets can be confusing
especially when you have to understand the words “and” and “or” which are ...

www.everythingmaths.co.za/grade-10/10-probability/10-probability-04.cnxmlplus

Union and intersection. Definition 1: Union. The union of two sets is a new set
that contains all of the elements that are in at least one of the two sets. The union
is ...

www.ask.com/youtube?q=Union and Intersection of Sets&v=En8fI2ixepo

Aug 29, 2010 ... Sets: Union and Intersection. Just a very quick and basic idea of the 'union' and '
intersection' of two sets.

www.mathsisfun.com/sets/venn-diagrams.html

This is called a "Union" of sets and has the special symbol ∪: ... is Union: is in
either set; ∩ is Intersection: must be in both sets; − is Difference: in one set but
not ...

www.probabilitycourse.com/chapter1/1_2_2_set_operations.php

The union of two sets is a set containing all elements that are in A or in B (
possibly both). For example, { 1 , 2 } ∪ { 2 , 3 } = { 1 , 2 , 3 } . Thus, we can write x
∈ ( A ...

math.stackexchange.com/questions/1131956/image-of-the-union-and-intersection-of-sets

Feb 3, 2015 ... The case where f ( A ∪ B ) = f ( A ) ∪ f ( B ) is trivial and I've proved this many
times in other classes. However, I believe that the problem I am ...