# Mathematical Dictionary - Letter N (continued)

MIXED NUMBER - Number consisting of an integer part and a fractional part.

ODD NUMBER - An integer that is not a multiple of 2. Examples of such numbers are:…, -7, -5, -3, -1, 1, 3, 5, 7, 9,…

FULL NUMBER - Integers are natural numbers and their opposites, joined to zero…, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6,…

IRRATIONAL NUMBER - A number that cannot be written in the form of dividing two whole numbers, such as = 3.1415926535… and and = 2,71828…

MIXED NUMBER - These are numbers that mix the writing of natural numbers with the writing of fractions. NATURAL NUMBER - Natural numbers are those coming from the counting process in nature. There is discussion about the fact that 0 (zero) is considered a natural number since it was created by Hindus to make sense of the nullity of something. 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11,…

ORDINAL NUMBER - The ordinal of a number expresses its position in a sequence, such as first, second, third, twentieth.

PAIR NUMBER - An integer that is a multiple of two. Examples of such numbers are:…, -6, -4, -2, 0, 2, 4, 6, 8,…

PRIME NUMBER - An integer greater than 1, which is not divisible by any number except it and 1. A prime number has only two different natural dividers.

RATIONAL NUMBER - A number that can be placed in the form of a fraction, where the numerator and denominator must be two integers and the denominator cannot be zero (0).

REAL NUMBER - All numbers that can be marked on a line, the real line. It comprises the integers, the fractional (set of rational) and even the irrational.

REGULAR NUMBERS - A number is said to be regular if its prime factor decomposition has only powers of 2, 3 and 5.

COMPLEX NUMBERS - They are numbers of the form a + bi where a is the real part and b the coefficient of the imaginary part defining: .

FERMAT NUMBERS - Shape Numbers .

NEGATIVE NUMBERS - All numbers less than zero.

POSITIVE NUMBERS - All numbers greater than zero.

PITORICAL NUMBERS - Are the integers that fulfill the Pythagorean equation2 + b2 = c2 . For example: 3, 4 and 5.

ROMAN NUMBERS - Type of numbers used by the Romans with the use of letters. Still widely used today, for example, to designate the centuries. In this system a lower left digit subtracts the larger one: 9 is represented by 10 - 1 (IX), 90 by 100 - 10 (XC). If the smallest digit is to the right of the largest, add: 11 = 10 + 1 (XI).

TRANSFER NUMBERS - It's the numbers that aren't algebraic. There is no integer coefficient polynomial from which they are root. The number Pi, for example, is a transcendent number because it cannot be obtained as the root of any integer coefficient polynomial. Transcendent numbers are infinite and there is much more than algebraic numbers (which are those that can be obtained as the root of an integer coefficient polynomial). Root of 3 is an algebraic number, since it is a solution of equation x2 - 3 = 0.

A - B - C - D - E - F - G - H - I / J / K - L - M - N - O - P - Q - R - S - T - U / V - X / Z