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Sum-product number — A sum product number is an integer that in a given base is equal to the sum of its digits times the product of its digits. Or, to put it algebraically, given an integer n that is l digits long in base b (with d x representing the x th digit), ifn … Wikipedia
Sum-free set — In additive combinatorics and number theory, a subset A of an abelian group G is said to be sum free if the sumset A⊕A is disjoint from A. In other words, A is sum free if the equation a + b = c has no solution with . For example, the set of odd… … Wikipedia
sum — [[t]sʌm[/t]] n. v. summed, sum•ming 1) math. the aggregate of two or more numbers, magnitudes, quantities, or particulars as determined by or as if by the mathematical process of addition: The sum of 6 and 8 is 14[/ex] 2) an amount or quantity,… … From formal English to slang
sum — sumless, adj. sumlessness, n. /sum/, n., v., summed, summing. n. 1. the aggregate of two or more numbers, magnitudes, quantities, or particulars as determined by or as if by the mathematical process of addition: The sum of 6 and 8 is 14. 2. a… … Universalium
Lack-of-fit sum of squares — In statistics, a sum of squares due to lack of fit, or more tersely a lack of fit sum of squares, is one of the components of a partition of the sum of squares in an analysis of variance, used in the numerator in an F test of the null hypothesis… … Wikipedia
With Me (Sum 41 song) — Infobox Single Name = With Me Artist = Sum 41 from Album = Underclass Hero Released = 2008 Format = Digital Download Recorded = November 6, 2006 March 2007 Genre = Alternative rock Length = 4:51 Label = Island Records Writer = Deryck Whibley… … Wikipedia
Symplectic sum — In mathematics, specifically in symplectic geometry, the symplectic sum is a geometric modification on symplectic manifolds, which glues two given manifolds into a single new one. It is a symplectic version of connected summation along a… … Wikipedia
Ramanujan's sum — This article is not about Ramanujan summation. In number theory, a branch of mathematics, Ramanujan s sum, usually denoted c q ( n ), is a function of two positive integer variables q and n defined by the formula:c q(n)=sum {a=1atop… … Wikipedia
PZL.46 Sum — infobox Aircraft name = PZL.46 Sum type = Light bomber and reconnaissance aircraft manufacturer =Państwowe Zakłady Lotnicze caption = designer = first flight = August 1938 introduced = retired = status = Prototype primary user = Polish Air Force… … Wikipedia
Character sum — In mathematics, a character sum is a sum of values of a Dirichlet character χ modulo N, taken over a given range of values of n. Such sums are basic in a number of questions, for example in the distribution of quadratic residues, and in… … Wikipedia
