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| 1 | Fermat Polygonal Number Theorem |
| Every positive integer is a sum of at most n n -polygonal numbers ... | |
| 2 | Negative |
| Negative has meaning in several contexts: Negative and non-negative numbers Negative (photography) Negative (music) For other contexts see "positive ... | |
| 3 | Numbers |
| Numbers can mean: Number Book of Numbers ... | |
| 4 | Erdös-Borwein constant |
| ... | |
| 5 | Heegner number |
| In number theory, a Heegner number is a positive integer n such that the quadratic field Q (√- n) has class number 1. Equivalently, its ring of integers has unique factorization. See Stark-Heegner theorem for the proof that such n that are square free are finite in number ... | |
| 6 | Deficient number |
| In mathematics, a deficient number or defective number is a number n for which σ (n ) < 2 n. Here σ (n ) is the divisor function: the sum of all positive divisors of n , including n itself. The value 2 n − σ (n ) is called the deficiency of n . Deficient numbers were first introduced in ... | |
| 7 | 1-1-1 |
| 111 has been the emergency telephone number in New Zealand for decades. It was specifically chosen to comply with the positioning of the 999 emergency number in England. The numbers on the dial phones in NZ and England were reversed, i.e., the nine and one were in the same position on the dial in ... | |
| 8 | Number line |
| , i.e. the number zero. Customarily, positive numbers lie on the right side of zero, and negative...A number line is a one-dimensional graph. It is often used as an aid in teaching simple addition or subtraction, especially involving negative numbers. The number line is most often represented as ... | |
| 9 | Positive |
| "certainty". In mathematics, a number is called positive if it is bigger than zero. See negative and non-negative numbers. In functional analysis, a bounded linear operator is positive if its spectrum consists of positive real numbers. In physics, one distinguishes positive and negative electric ... | |
| 10 | Landau-Ramanujan constant |
| In mathematics, the Landau-Ramanujan constant occurs in a number theory result that the proportion of positive integers less than x which are the sum of two square numbers is, for large x , roughly..., if N (x ) is the number of positive integers less than x which are the sum of two squares, then ... | |
| 11 | Cabtaxi number |
| In mathematics, the n th cabtaxi number , typically denoted Cabtaxi (n ), is defined as the smallest positive integer that can be written as the sum of two positive or negative cubes in n ways. Such numbers exist for all n (since taxicab numbers exist for all n ); however, only 8 are known (OEIS ... | |
| 12 | Negaternary |
| a need for a minus sign; negative numbers can be written the same way as positive numbers. (Compare... As in negabinary, negative numbers have an even number of digits, and positive numbers have an odd... Negaternary is a numeral system in which numbers are written as sums of successive powers of -3 ... | |
| 13 | Positive element |
| In functional analysis, an element of a C*-algebra is a positive element if its spectrum consists of positive real numbers. If A is a bounded linear operator on a Hilbert space , then this notion coincides with the condition that should be positive for every vector ... | |
| 14 | Positional notation |
| multiplied by a power of the base number for that numeral system. The position of each character or... be multiplied by that digit. For example, in the decimal or base 10 number system, each position... , and so on for each successive position. The total value of a number in a positional system is the ... | |
| 15 | Almost all |
| synonymous with "all but finitely many"; see almost. In number theory, if P (n ) is a property of positive integers, and if p (N ) denotes the number of positive integers n less than N for which P (n... for almost all positive integers n ". For example, the prime number theorem states that the number of ... |