Symbols are
a concise
way of giving
lengthy
instructions
related to
numbers and
logic.
Symbols are
a communication
tool. Symbols
are used to
eliminate the
need to write
long, plain
language
instructions to
describe
calculations
and other
processes.
For example, a
single symbol
stands for the
entire process
for addition.
The familiar
plus sign
eliminates the
need for a long
written
explanation of
what addition
means and how
to accomplish
it.
The same
symbols are
used worldwide
. . .
The symbols
used in
mathematics are
universal.
The same math
symbols are
used throughout
the civilized
world. In most
cases each
symbol gives
the same clear,
precise meaning
to every
reader,
regardless of
the language
they speak.
The most
valuable,
most
frequently used
Symbols in
mathematics . .
.
The most
important, most
frequently used
Symbols for
Set
Notation
are listed
below.
Return
To
"Top
of
Page"
click
here
Symbol
for
"NOT
an Element
of a
Set"

x
A
means the
small
letter
x
is not an
element
the set
identified
by the
letter
A.
Example 1:
, Set
A:
A
=
{a, b, c,
d}
Set
"A"
contains
the
following
elements:
a, b, c,
d
x
is
"not
an
element"
of Set
A
x
A
Example 2:
, Set
B:
B
=
{1, 3, 9,
11}
Set
"B"
contains
the
following
elements:
1, 3, 9,
11
99
is
"not
an
element"
of Set
B
99
B
Example 3:
, Set
C:
C
=
{dog, cat,
bird,
horse,
rabbit}
Set
"C"
contains
the
following
elements:
dog, cat,
bird,
horse,
rabbit
whale
is
"not
an
element"
of Set
C
whale
C