## Symbols and Notation

-the set of positive integers and zero

–x is greater than y is greater than

–x is less than y

x >=y – x is greater than or equal to y

-the set of integers,

-the set of positive integers,

-the set of rational numbers

-the set of positive rational numbers

-the nth term of a sequence or series

-a function under which x is mapped to y

theimage of x under the function f

–the inverse of the function f

theset of real numbers

-the set of real positive numbers

-logarithm to the base a of x

sin, cos, tan - the circular/trigonometric functions

theset with elements

-the point A in the plane with Cartesian coordinates x and y

-the number of elements in the finite set A

-the set of all x such that the statement is true

–x is a member of the set A

–x is a member of the set A

or–the empty or null set, containing no elements

–the union of sets A and B – the set of elements in either A or B

–the intersection of sets A and B – the set of elements in both Aand B

-the universal set

-A is a proper subset of B

-A is a subset of B, and A may be equal to B

–the complement of the set A – the set of all elements not in set A.

–the Angle at A

-the angle between CA and AB

-the triangle whose vertices are A, B and C

- the vector

–the length or magnitude of the vector

–the vector from point A to point B

–the distance between points A and B

-observations of a variable

-the frequencies with which the observationsoccur

-probability of event A

-probability of the event “not A”

–the mean of the values x_1 , x_2 , …

–Pearson's correlation coefficient

–coefficient of determination

–sum of the frequencies

–the nth root of a . If n >0 is even, then a must be positive

–the absolute value or magnitude of x

–denotes identity or equivalency

-x is approximately equal to y

-A is congruent to B

-vectorsandareparallel

-vectorsandareperpendicular