The letters R, Q, N, and Z refers to a set of numbers such that: R = real numbers includes all real number [-inf, inf] ... what does the word [n] mean in math. Purplemath. Definition of a Set. The intersection of two sets has only the elements common to both sets. In Maths, the Set theory was developed to explain about collections of objects. Math. A set is a collection of elements that are usually related. Set definition is - to cause to sit : place in or on a seat. Universal Set in Math: Definition, Example & Symbol ... To write the set in math terms you would write: A = { Key, Hound, Fish, Cow, Bike } A set is usually named with a capital letter. These objects are sometimes called elements or members of the set. A set is a group of things that belong together, like the set of even numbers (2,4,6…) or the bed, nightstands, and dresser that make up your bedroom set. Basically, the definition states that “it is a collection of elements”. Symbol Symbol Name Meaning / definition Example { } set: a collection of elements: A = {3,7,9,14}, B = {9,14,28} A ∩ B: intersection: objects that belong to set A and set B The symbol is an upside down U like this: ∩ Example: The intersection of the "Soccer" and "Tennis" sets is just casey and drew (only … 2 CS 441 Discrete mathematics for CS M. Hauskrecht Set • Definition: A set is a (unordered) collection of objects. These elements could be numbers, alphabets, variables, etc. If an element is in just one set it is not part of the intersection. X … Usually, you'll see it when you learn about solving inequalities, because for some reason saying "x < 3" isn't good enough, so instead they'll want you to phrase the answer as "the solution set is { x | x is a real number and x < 3 }".How this adds anything to the student's understanding, I don't know. Before we get into the definition of an equivalent set, we need to first know what a set is. You never know when set notation is going to pop up. 1 Educator answer. (Cantor's naive definition) • Examples: – Vowels in the English alphabet V = { a, e, i, o, u } – First seven prime numbers. The mean is the average of the data set, the median is the middle of the data set, and the mode is the number or value that occurs most often in the data set. How to use set in a sentence. Section 2.1: Set Theory – Symbols, Terminology Definition: A set is a collection of objects.