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- ...would not in fact be fundamental). Rather, a fundamental concept such as ''number'' can only be explained by demonstration. Such an approach relies for its e There are [[philosophy|philosophical]] problems bound up with the concept of number. First, there is the [[Ontology|ontological]] problem of the various types11 KB (1,701 words) - 20:07, 1 July 2021
- The '''natural numbers''' are the [[number]]s (0), 1,2,3,etc. used for counting, They are also used to indicate the number of equal parts16 KB (2,562 words) - 00:45, 13 October 2009
- #Redirect [[Triangular number]]31 bytes (3 words) - 10:43, 19 May 2008
- ...itten as the [[vulgar fraction]] <math>a/b</math>, where ''b'' is not [[0 (number)|zero]]. ...[divisor]]s except 1 (i.e., they are [[coprime]]). Every non-zero rational number has exactly one simplest form of this type with a positive denominator. A f9 KB (1,446 words) - 08:52, 30 May 2009
- #REDIRECT [[Random number generator]]37 bytes (4 words) - 23:32, 21 August 2009
- ...tp://books.google.com/books?id=wqg4AAAAMAAJ&printsec=frontcover&dq=intitle:number+intitle:concept+inauthor:levi&lr=&num=30&as_brr=1 online edition]695 bytes (100 words) - 11:35, 19 May 2008
- ...- a\ </math> for every integer <math>\scriptstyle a\ </math>. A Carmichael number ''c'' also satisfies the [[modular arithmetic|congruence]] <math>\scriptsty *Every Carmichael number is [[square-free integer|square-free]] and has at least three different pri4 KB (576 words) - 12:00, 1 January 2013
- '''Number theory''' is a branch of [[pure mathematics]] devoted primarily to the stud ([[diophantine geometry]]). Questions in number theory are often best understood through27 KB (4,383 words) - 08:05, 11 October 2011
- ...[[real number]] and is the [[integer]] between [[1 (number)|1]] and [[-1 (number)|-1]], which signifies a value of nothing. It is also a [[numerical digit]] The number zero was invented twice - once in India and once in Mesoamerica. This inve1 KB (232 words) - 03:30, 6 November 2009
- #REDIRECT [[Atomic number]]27 bytes (3 words) - 17:22, 2 April 2008
- 26 bytes (3 words) - 15:04, 28 December 2007
- 143 bytes (19 words) - 11:38, 19 May 2008
- ...is a [[complex number]] that is a root of a [[polynomial]] with [[rational number|rational]] coefficients. Real or complex numbers that are not algebraic are called [[transcendental number]]s.7 KB (1,145 words) - 00:49, 20 October 2013
- ...n which the first number is 0, the second number is 1, and each subsequent number is equal to the sum of the previous two numbers in the series. In mathemati *If <math>\ F_p\ </math> is a prime number different from 3, then <math>\ p</math> is prime. (The converse is fa5 KB (743 words) - 13:10, 27 July 2008
- ...an '''irrational number''' is any [[real number]] that is not a [[rational number]], i.e. it cannot be expressed as a [[fraction]] ''m'' / ''n'' in ...ble to demonstrate that <math>\scriptstyle\sqrt{2}</math> is an irrational number.4 KB (666 words) - 11:23, 3 October 2009
- ...f the sequence of Perrin numbers is, that if <math>p\ </math> is a [[prime number]], then <math>p\ </math> divides <math>P_p\ </math>. The converse is false,828 bytes (104 words) - 04:32, 19 May 2008
- ...ed by publication of joint papers — as a graph. A researcher's Erdős number is the length of the shortest path, via co-author relationships, connecting More explicitly, your Erdős number is the ''first'' number in the following list which applies to you:2 KB (370 words) - 12:51, 11 February 2013
- ...visors of 6 are 1, 2, and 3, and 1+2+3=6. In contrast, 4 is not a perfect number, as the proper divisors of 4 are 1 and 2, and <math> \scriptstyle 1+2 \neq The origin of the term "perfect number" appears to be unknown. Ancient Greeks probably ascribed mystical properti4 KB (677 words) - 19:07, 7 November 2008
- ...ers''' is strongly related to the sequence of [[Fibonacci number]]s. Lucas number and Fibonacci numbers have the identical formula <math>a_n = a_{n-1} + a_{n *If <math>p\ </math> is a prime number, than <math>p\ </math> divides <math>L_p - 1\ </math>. The converse is fals798 bytes (117 words) - 04:00, 4 March 2008
- #REDIRECT [[Erdős number]]27 bytes (4 words) - 01:28, 3 April 2011
Page text matches
- * [[Deficient number]] * [[Abundant number]]255 bytes (24 words) - 21:27, 2 April 2008
- *[[Fibonacci number]] *[[Lucas number]]136 bytes (13 words) - 17:46, 17 February 2008
- {{r|Prime number}} {{r|Carmichael number||***}}395 bytes (45 words) - 07:44, 11 November 2009
- {{r|Prime number}} {{r|Whole number}}258 bytes (33 words) - 02:29, 8 February 2009
- An infinite number, either a cardinal number or an ordinal number.103 bytes (14 words) - 18:45, 20 June 2009
- *[[Hyperreal number]] *[[Complex number]]389 bytes (39 words) - 12:37, 4 January 2009
- ...t in [[number theory]] for its connection with the distribution of [[prime number]]s.219 bytes (27 words) - 16:59, 13 November 2008
- ...equal to the number of "[[hole (topology)|holes]]" or "handles"; a [[Betti number]].189 bytes (26 words) - 14:02, 8 February 2010
- ...s a negative real number, or (sometimes) more generally a non-real complex number.170 bytes (23 words) - 09:38, 1 January 2010
- ...eometry)|vertices]] minus the number of [[Edge (geometry)|edge]]s plus the number of [[Face (geometry)|faces]]; it is always equal to 2 for [[convex polyhedr284 bytes (41 words) - 14:01, 8 February 2010
- A positive whole number whose proper divisors sum to the number itself.107 bytes (15 words) - 20:58, 28 June 2008
- ...|vacancies]] expressed as a percentage of the number of vacancies plus the number in [[employment]].177 bytes (24 words) - 16:47, 20 August 2010
- Greater in size (number of elements, length, area, etc.) than any natural number117 bytes (16 words) - 00:12, 26 October 2009
- ...ed transuranic elements whose atomic number are higher than 92, the atomic number of uranium.211 bytes (30 words) - 12:16, 5 May 2010
- The number of its elements is a natural number (0,1,2,3,...)97 bytes (12 words) - 18:46, 6 July 2009
- The number of its elements is larger than any natural number. (See: [[Finite set]].)121 bytes (17 words) - 19:09, 6 July 2009
- ...n which the first number is 0, the second number is 1, and each subsequent number is equal to the sum of the previous two numbers.191 bytes (31 words) - 15:05, 3 July 2008
- {{r|Number}} {{r|Real number}}276 bytes (34 words) - 10:41, 21 April 2010
- {{r|Number theory}} {{r|Number}}291 bytes (36 words) - 08:06, 19 August 2009
- Unestablished conjecture that every even number except the number 2 is the sum of two primes.130 bytes (18 words) - 08:14, 4 September 2009