definition of a set math 101
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set-builder notation
A notation used to describe the elements of a set A={x|x is all numbers less than 10}
Listing
A={1,3,5,7,9}
word description
Describing the members of the set using words, A={all the numbers less than 10}
Cardinal elements of a set
The number of elements of a set
repeated element
counts as one
curly brackets
in mathematics, we write a set by enclosing its elements
universal set
includes all possible choices for a product category
set
is a collection of objects called elements All students enrolled in a course is a set.
well-defined
means that we know exactly what elements belong to the set. not vague
capital letters
names for sets
equal
two sets are _____ if they contain the same elements