not+divisible+by+2
21Aristotle — /ar euh stot l/, n. 384 322 B.C., Greek philosopher: pupil of Plato; tutor of Alexander the Great. * * * born 384, Stagira died 322 BC, Chalcis Greek philosopher and scientist whose thought determined the course of Western intellectual history… …
22Group (mathematics) — This article covers basic notions. For advanced topics, see Group theory. The possible manipulations of this Rubik s Cube form a group. In mathematics, a group is an algebraic structure consisting of a set together with an operation that combines …
23Number theory — A Lehmer sieve an analog computer once used for finding primes and solving simple diophantine equations. Number theory is a branch of pure mathematics devoted primarily to the study of the integers. Number theorists study prime numbers (the… …
24Pseudomathematics — is a form of mathematics like activity that does not work within the framework, definitions, rules, or rigor of formal mathematical models. While any given pseudomathematical approach may work within some of these boundaries, for instance, by… …
25Gauss's lemma (polynomial) — This article is about Gauss s lemma for polynomials. See also Gauss s lemma. In algebra, in the theory of polynomials, Gauss s lemma, named after Carl Friedrich Gauss, is either of two related statements about polynomials with integral… …
26Abundant number — In mathematics, an abundant number or excessive number is a number n for which σ ( n ) > 2 n . Here σ ( n ) is the sum of divisors function: the sum of all positive divisors of n , including n itself. The value σ ( n ) − 2 n is called the… …
27Rokhlin's theorem — In 4 dimensional topology, a branch of mathematics, Rokhlin s theorem states that if a smooth, compact 4 manifold M has a spin structure (or, equivalently, the second Stiefel Whitney class w 2( M ) vanishes), then the signature of its… …
28February 29 — in the Gregorian calendar, which is most widely used in the world today, is a date that occurs only every four years, in years evenly divisible by 4, such as 1996, 2000, 2004, 2008, 2012 or 2016 (with the exception of century years not divisible… …
29Giuga number — A Giuga number is a composite number n such that each of its distinct prime factors p i is a divisor of {n over p i} 1. Another test is if the congruence nB {phi(n)} equiv 1 pmod n holds true, where B is a Bernoulli number. The Giuga numbers are… …
30Generic polynomial — In Galois theory, a branch of modern algebra, a generic polynomial for a finite group G and field F is a monic polynomial P with coefficients in the field L = F ( t 1, ..., t n ) of F with n indeterminates adjoined, such that the splitting field… …
