Mathematics is the science of numbers as Aristotle defined. Here we have collected all the important mathematics definitions. Browse these definitions or use the Search function for a specific definition.

Math Definitions

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There are currently 2 definitions in this directory beginning with the letter U.
Unequal
Not equal.

Example: 7 and 5 are unequal.

The symbol is ≠ (the "not equal" symbol).

Example: 7 ≠ 5
Union
The set made by combining the elements of two sets.

So the union of sets A and B is the set of elements in A, or B, or both.

The symbol is a special "U" like this: ∪

Example:
Soccer = {alex, hunter, casey, drew}
Tennis = {casey, drew, jade}
Soccer ∪ Tennis = {alex, hunter, casey, drew, jade}
In words: the union of the "Soccer" and "Tennis" sets is alex, hunter, casey, drew and jade

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