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.
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Symbol
for Null
Set (Empty
Set)

A Null Set
is a set
which
contains
nothing
(no
elements).
Using the
Null Set
Symbol
Set
A is
inhabited,
and contains
the following
four elements:
a, b, c, d.
A
= {a, b, c,
d}
Set
(Null Set)
is
empty.
It
contains
no
elements:
"nothing".
=
{}
The notations
and
{}
are
equivalent
to one
another.
They mean
exactly
the same
thing.
Because a
Null
Set
contains no
elements, it is
also called an
Empty
Set. The
two terms are
synonyms for
one
another.
Another term
which is also
used as a
synonym for a
null set is
Negligible
Set. A
negligible set
is any set
which is so
small (relative
to the problem
you are trying
to solve) that
it can be
ignored.
(Null Set)
is not the
same as
the number
0
(zero).
The number
0
(zero) is
a whole
number.