NationMaster - Encyclopedia: 9000 (number)

9000 (nine thousand) is the natural number following 8999 and preceding 9001. In mathematics, a natural number can mean either an element of the set {1, 2, 3, ...} (i. ...

Aleph-0, the smallest infinite cardinal In mathematics, cardinal numbers, or cardinals for short, are a generalized kind of number used to denote the size of a set, known as its cardinality. ... In set theory, ordinal, ordinal number, and transfinite ordinal number refer to a type of number introduced by Georg Cantor in 1897, to accommodate infinite sequences and to classify sets with certain kinds of order structures on them. ... ... The system of Roman numerals is a numeral system originating in ancient Rome, and was adapted from Etruscan numerals. ... The binary numeral system, or base-2 number system, is a numeral system that represents numeric values using two symbols, usually 0 and 1. ... The octal numeral system, or oct for short, is the base-8 number system, and uses the digits 0 to 7. ... The duodecimal (also known as base-12 or dozenal) system is a numeral system using twelve as its base. ... In mathematics and computer science, hexadecimal, base-16, or simply hex, is a numeral system with a radix, or base, of 16, usually written using the symbols 0â€“9 and Aâ€“F, or aâ€“f. ...

In other fields

Sign on a wholesaler at the Tsukiji fish market indicates ISO 9001 certification. ... â€œISOâ€ redirects here. ...

Selected numbers in the range 9000 - 9999

Category: Integers A centered cube number is a centered figurate number that represents a cube. ... A centered octagonal number is a centered figurate number that represents an octagon with a dot in the center and all other dots surrounding the center dot in successive octagonal layers. ... A prime number p is called a Sophie Germain prime if 2p + 1 is also prime. ... A triangular number is the sum of the n natural numbers from 1 to n. ... Sophie Germain Marie-Sophie Germain (April 1, 1776 â€“ June 27, 1831), born to a middle-class merchant family in Paris, France, was a French mathematician. ... A decagonal number is a figurate number that represents a decagon. ... A Markov number or Markoff number is an integer x, y or z that is part of a solution to the Markov Diophantine equation The first few Markov numbers are 1, 2, 5, 13, 29, 34, 89, 169, 194, 233, 433, 610, 985, 1325, ... (sequence A002559 in OEIS) appearing in... In mathematics, a unique prime is a certain kind of prime number. ... A pentagonal pyramidal number is a number equal to the sum of the first few pentagonal numbers. ... A pyramid with side length 5 contains 35 spheres. ... An octahedral number is a figurate number that represents an octahedron, or two pyramids placed together, one upside-down underneath the other. ... A cuban prime is a prime number that is a solution to one of two different specific equations involving third powers of x and y. ... The term weird number also refers to a phenomenon in twos complement arithmetic. ... A centered heptagonal number is a centered figurate number that represents a heptagon with a dot in the center and all other dots surrounding the center dot in successive heptagonal layers. ... A nonagonal number or enneagonal number is a figurate number that represents a nonagon. ... A Lucas prime is a Lucas number that is prime. ... A balanced prime is a prime number that is equal to the arithmetic mean of the nearest prime above and below. ... A pyramidal number, or square pyramidal number, is a figurate number that represents a pyramid with a base and four sides. ... A safe prime is a prime number of the form 2p + 1, where p is also a prime. ... The CD-ROM (an abbreviation for Compact Disc Read-Only Memory (ROM)) is a non-volatile optical data storage medium using the same physical format as audio compact discs, readable by a computer with a CD-ROM drive. ... A Ruth-Aaron pair consists of two consecutive integers (e. ... The magic constant of a magic square, an n-by-n matrix, is defined such that the sum of any row, column or main diagonal yields the same result, denoted M2(n). ... In recreational mathematics, a magic square of order n is an arrangement of nÂ² numbers, usually distinct integers, in a square, such that the n numbers in all rows, all columns, and both diagonals sum to the same constant. ... One possible solution The eight queens puzzle is the problem of putting eight chess queens on an 8Ã—8 chessboard such that none of them is able to capture any other using the standard chess queens moves. ... C is a general-purpose, block structured, procedural, imperative computer programming language developed in 1972 by Dennis Ritchie at the Bell Telephone Laboratories for use with the Unix operating system. ... In mathematics, a prime number (or a prime) is a natural number which has exactly two distinct natural number divisors: 1 and itself. ... Intel Pentium 4 (Northwood version), one example out of a huge number of x86 implementations from Intel, AMD, and others. ... Microsofts disk operating system, MS-DOS, was Microsofts implementation of DOS, which was the first popular operating system for the IBM PC, and until recently, was widely used on the PC compatible platform. ... In mathematics, a chiliagonal number is a number which can be arranged to form a chiliagon. ... The year 10,000 problem is the collective name for all potential software bugs that may emerge as the need to express years with five digits arises. ... In mathematics, a Kaprekar number is a number that, in a given base, when squared, can be split into two numbers with the same number of digits as the original number which add up to the original number again. ...