Mathematics. Dictionary

Natural logarithm · N

The logarithm in base : either the function that given returns such that = , or the value of given by the function.

Natural number · N

A positive integer {1, 2, 3, ...}.

Negative number · N

In mathematics, a negative number is the opposite of a positive real number. Equivalently, a negative number is a real number that is less than zero. Negative numbers are often used to represent the magnitude of a loss or deficiency. A debt that is owed may be thought of as a negative asset. If a quantity, such as the charge on an electron, may have either of two opposite senses, then one may choose to distinguish between those senses—perhaps arbitrarily—as positive and negative.…

Net · N

Any set of polygons joined edge to edge that, when folded along the edges between adjoining polygons so that the outer edges touch, form a given polyhedron.

Normal distribution · N

Any of a family of continuous probability distributions such that the probability density function is the Gaussian function

Null hypothesis · N

A hypothesis set up to be nullified or refuted in order to support an alternative hypothesis. When used, the null hypothesis is presumed true until statistical evidence in the form of a hypothesis test indicates otherwise. Therefore, the null and the alternative hypothesis must be mutually exclusive and exhaustive.

Number line · N

A line that graphically represents the real numbers as a series of points whose distance from an origin is proportional to their value

Number theory · N

The branch of pure mathematics concerned with the properties of integers.

Numerator · N

The number or expression written above the line in a fraction (such as 1 in ½).

Numerical analysis · N

The study of algorithms to solve mathematical problems concerning continuous sets of values (such as the real numbers, complex numbers or vector spaces).

Numerical integration · N

The study of numerical analysis algorithms to obtain approximate values of definite integrals.