sieve field
Look at other dictionaries:
sieve area — noun also sieve field : an area in the wall of a sieve tube element, sieve cell, or parenchyma cell in which are clustered pores through which cytoplasmic connections pass to adjoining cells and which in sieve tube elements are typically most… … Useful english dictionary
Sieve of Eratosthenes — Sieve of Eratosthenes: algorithm steps for primes below 121 (including optimization of starting from prime s square). In mathematics, the sieve of Eratosthenes (Greek: κόσκινον Ἐρατοσθένους), one of a number of prime number sieves, is a simple,… … Wikipedia
Sieve theory — is a set of general techniques in number theory, designed to count, or more realistically to estimate the size of, sifted sets of integers. The primordial example of a sifted set is the set of prime numbers up to some prescribed limit X .… … Wikipedia
Sieve — In general, a sieve separates wanted/desired elements from unwanted material using a tool such as a mesh, net or other filtration or distillation methods, but it is also used for classification of powders by particle size, or for size measurement … Wikipedia
Sieve (mathematics) — In mathematics, sieve has several possible definitions: * In number theory, a sieve is a technique for counting the size of certain sets whose precise number of elements is hard to determine. See sieve theory, general number field sieve, and… … Wikipedia
Sieve of Sundaram — In mathematics, the sieve of Sundaram is a simple deterministic algorithm for finding all prime numbers up to a specified integer. It was discovered by an Indian student S. P. Sundaram from Sathyamangalam in 1934. [cite journal |author=V.… … Wikipedia
General number field sieve — In number theory, the general number field sieve (GNFS) is the most efficient classical algorithm known for factoring integers larger than 100 digits. Heuristically, its complexity for factoring an integer n (consisting of log2 n bits) is of … Wikipedia
Special number field sieve — The special number field sieve (SNFS) is a special purpose integer factorization algorithm. The general number field sieve (GNFS) was derived from it.The special number field sieve is efficient for integers of the form r e plusmn; s , where r and … Wikipedia
Quadratic sieve — The quadratic sieve algorithm (QS) is a modern integer factorization algorithm and, in practice, the second fastest method known (after the general number field sieve). It is still the fastest for integers under 100 decimal digits or so, and is… … Wikipedia
Rational sieve — In mathematics, the rational sieve is a general algorithm for factoring integers into prime factors. It is essentially a special case of the general number field sieve, and while it is far less efficient than the general algorithm, it is… … Wikipedia
