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mathematics
The science that uses deductive reasoning to study the properties of abstract entities such as numbers, space and functions and the relations between them.

factorial
Product of all positive whole numbers less than and equal to a given number. For example, the factorial of 4 is: 4! = 1x2x3x4 = 24.

integral
Result of the integral calculation used especially to determine an area and to resolve a differential equation.

infinity
Symbol denoting that a value has no upper limit.

fraction
Sign denoting that the number on the left of the slash (numerator) is one part of the number on the right of the slash (denominator).

sum
Sign indicating that several values are to be added together (their sum).

square root of
Sign denoting that, when a number is multiplied by itself, the result is the number that appears below the bar.

is not an element of
Binary sign denoting that the element on the left is not included in the set on the right.

is an element of
Binary sign denoting that the element on the left is included in the set on the right.

union of two sets
Binary sign denoting that a set is composed of the sum of the elements of two sets.

intersection of two sets
Binary sign denoting that two sets M and N have elements in common.

is included in/is a subset of
Binary sign denoting that a set A on the left is part of the set B on the right.

percent
Sign denoting that the number preceding it is a fraction of 100.

empty set
Sign denoting that a set contains no elements.