Math Dictionary-N deals with words starting with the letter **N**.

In mathematics natural numbers are whole numbers that used for counting and ordering. Only difference between natural numbers and whole numbers is

Numbers which are less than zero are called negative numbers. Negative numbers are written with a negative sign.

** Negation of a statement:** In math and logic s negation is used for defying the negative statement. For every statement 'p', the negation statement is 'not p'. The negation is denoted as ~ p, or −p, or ¬p. The truth value ~ p is opposite of truth value of p.

A two dimensional figure that can be folded into 3 dimensional object.

A n sided polygon.

A node is a connection point.

In a directed graph the neighborhood of a vertex v in a graph G is the set of vertices adjacent to v. Usually the neighborhood is denoted N(v). The neighborhood will not include v itself. For example, in the below graph neighborhood of E that is N(E) = {A,B,D} and N(F) = {D}.

More words on math dictionary-n as follows:

**Nonagon**

In geometry Nonagon is a nine sided polygon.

**Non convex set**

A set of points in which not all segments connecting points of the set lie entirely in the set.

__Non-collinear points__

Three or more points that do not lie on the same line.

__Non-coplannar points__

Four or more points that do not lie on the same plane.

__Number line:__

In basic mathematics number line is a picture of straight line on which every point is assumed to real number. You can learn more about number line here.

__Numerator:__

The lower part of a fraction is called numerator.

**Numeral system:**

Writing system for expressing numbers. Arabic numerals and Hindu-Arabic numerals are commonly used numeral systems.

We had given meaning and other information about the words starting with n in this page 'Math dictionary-n'.

“Mathematics, without this we can do nothing in our life. Each and everything around us is math.

Math is not only solving problems and finding solutions and it is also doing many things in our day to day life. They are:

It subtracts sadness and adds happiness in our life.

It divides sorrow and multiplies forgiveness and love.

Some people would not be able accept that the subject Math is easy to understand. That is because; they are unable to realize how the life is complicated. The problems in the subject Math are easier to solve than the problems in our real life. When we people are able to solve all the problems in the complicated life, why can we not solve the simple math problems?

Many people think that the subject math is always complicated and it exists to make things from simple to complicate. But the real existence of the subject math is to make things from complicate to simple.”

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**Math Dictionary **