| = |
equal to |
 |
infinity |
 |
not equal to |
bn |
b to the nth power |
 |
approximately equal to |
 |
The nth root of x
or  |
| > |
Greater than |
 |
The square root of a |
 |
Greater than or equal to |
i |
Imaginary
number,  |
| < |
Less than |
a+bi |
Complex
number |
 |
Less than or equal to |
 |
plus or minus |
| a<x<b |
x is less than b
and greater than a |
(a, b) |
An ordered pair; often a is associated
with x and b is associated with y |
 |
x is less than and equal to b
and greater than and equal to a |
f,g,h,y etc. |
Name of functions |
 |
Repeating decimal:  |
f(x) |
Notation for a function of x |
| LCM |
Least common multiple |
 |
The composite of the functions f and g |
| LCD |
Least common denominator |
 |
Notation for the inverse of the function f |
| {a,b, c,d} |
The set with elements a, b, c, d |
 |
pi |
 |
The set of all x greater than or
equal to a |
 |
The nth term of a sequence |
 |
The null set or empty set |
 |
Sum of n terms of a sequence |
 |
a is an element of set B |
 |
Summation sign |
 |
a is not
an element of set B |
 |
Infinite sum of a sequence |
 |
a is a subset of set B |
n! |
The nth factorial -  |
 |
An interaction between sets A and
B |
 |
Common logarithm (base 10) or x=10
y |
 |
A union between sets A and
B |
 |
Natural logarithm (base e) or x=e
y |
| |x| |
The absolute value of x |
 |
Logarithm, to the base b, of x
or x=b y |