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. 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. 1 Educator answer. The symbol is an upside down U like this: ∩ Example: The intersection of the "Soccer" and "Tennis" sets is just casey and drew (only … 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. These objects are sometimes called elements or members of the set. The intersection of two sets has only the elements common to both sets. These elements could be numbers, alphabets, variables, etc. Purplemath. Set definition is - to cause to sit : place in or on a seat. Definition of a Set. If an element is in just one set it is not part of the intersection. Math. Section 2.1: Set Theory – Symbols, Terminology Definition: A set is a collection of objects. 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. Basically, the definition states that “it is a collection of elements”. X … How to use set in a sentence. (Cantor's naive definition) • Examples: – Vowels in the English alphabet V = { a, e, i, o, u } – First seven prime numbers. In Maths, the Set theory was developed to explain about collections of objects. 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. 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. 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 A set is a collection of elements that are usually related. 2 CS 441 Discrete mathematics for CS M. Hauskrecht Set • Definition: A set is a (unordered) collection of objects.