nonnegative number
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Nonnegative rank (linear algebra) — In linear algebra, the nonnegative rank of a nonnegative matrix is a concept similar to the usual linear rank of a real matrix, but adding the requirement that certain coefficients and entries of vectors/matrices have to be nonnegative. For… … Wikipedia
Nonnegative matrix — A nonnegative matrix is a matrix in which all the elements are equal to or greater than zero A positive matrix is a matrix in which all the elements are greater than zero. The set of positive matrices is a subset of all non negative matrices. A… … Wikipedia
nonnegative — /non neg euh tiv/, adj. Math. (of a real number) greater than or equal to zero. [1880 85; NON + NEGATIVE] * * * … Universalium
Natural number — Natural numbers can be used for counting (one apple, two apples, three apples, ...) from top to bottom. In mathematics, the natural numbers are the ordinary whole numbers used for counting ( there are 6 coins on the table ) and ordering ( this is … Wikipedia
Fermat number — In mathematics, a Fermat number, named after Pierre de Fermat who first studied them, is a positive integer of the form:F {n} = 2^{2^{ overset{n} {} + 1where n is a nonnegative integer. The first nine Fermat numbers are OEIS|id=A000215:As of|2008 … Wikipedia
Graham's number — Graham s number, named after Ronald Graham, is a large number that is an upper bound on the solution to a certain problem in Ramsey theory. This number gained a degree of popular attention when Martin Gardner described it in the Mathematical… … Wikipedia
Additive number theory — In mathematics, additive number theory is a branch of number theory that studies ways to express an integer as the sum of integers in a set. Two classical problem in this area of number theory are the Goldbach conjecture and Waring s problem.… … Wikipedia
Real number — For the real numbers used in descriptive set theory, see Baire space (set theory). For the computing datatype, see Floating point number. A symbol of the set of real numbers … Wikipedia
Regular number — The numbers that evenly divide the powers of 60 arise in several areas of mathematics and its applications, and have different names coming from these different areas of study. As an example, 602 = 3600 = 48 times; 75, so both 48 and 75 are… … Wikipedia
Powerful number — A powerful number is a positive integer m that for every prime number p dividing m , p 2 also divides m . Equivalently, a powerful number is the product of a square and a cube, that is, a number m of the form m = a 2 b 3, where a and b are… … Wikipedia
Fermat polygonal number theorem — In mathematics, the Fermat polygonal number theorem states: every positive integer is a sum of at most n n polygonal numbers. That is, every number can be written as the sum of at most three triangular numbers, or four square numbers, or five… … Wikipedia
