The number 142,857 is a Kaprekar number.[1] 142857, the six repeating digits of 1/7 (0.142857), is the best-known cyclic number in base 10.[2][3][4][5] If it is multiplied by 2, 3, 4, 5, or 6, the answer will be a cyclic permutation of itself, and will correspond to the repeating digits of 2/7, 3/7, 4/7, 5/7, or 6/7 respectively. Calculation[edit] 1 × 142,857 = 142,857 2 × 142,857 = 285,714 3 × 14
This picture is used as a test to demonstrate that people may not attach sounds to shapes arbitrarily. When given the names "kiki" and "bouba", many cultural and linguistic communities worldwide robustly tend to label the shape on the left "kiki" and the one on the right "bouba". The bouba/kiki effect, or kiki/bouba effect, is a non-arbitrary mental association between certain speech sounds and ce
In decision theory and estimation theory, Stein's example (also known as Stein's phenomenon or Stein's paradox) is the observation that when three or more parameters are estimated simultaneously, there exist combined estimators more accurate on average (that is, having lower expected mean squared error) than any method that handles the parameters separately. It is named after Charles Stein of Stan
Poqet PC The Poqet PC is a very small, portable IBM PC compatible computer, introduced in 1989 by Poqet Computer Corporation with a price of $2000. The computer was discontinued after Fujitsu Ltd. bought Poqet Computer Corp. It was the first subnotebook form factor IBM PC compatible computer that ran MS-DOS. The Poqet PC is powered by two AA-size batteries. Through the use of aggressive power mana
Tacit programming, also called point-free style, is a programming paradigm in which function definitions do not identify the arguments (or "points") on which they operate. Instead the definitions merely compose other functions, among which are combinators that manipulate the arguments. Tacit programming is of theoretical interest, because the strict use of composition results in programs that are
This article includes a list of general references, but it lacks sufficient corresponding inline citations. Please help to improve this article by introducing more precise citations. (May 2013) (Learn how and when to remove this message) In computing, partial evaluation is a technique for several different types of program optimization by specialization. The most straightforward application is to
One iteration of the middle-square method, showing a 6-digit seed, which is then squared, and the resulting value has its middle 6 digits as the output value (and also as the next seed for the sequence). Directed graph of all 100 2-digit pseudorandom numbers obtained using the middle-square method with n = 2. In mathematics and computer science, the middle-square method is a method of generating p
A randomness extractor, often simply called an "extractor", is a function, which being applied to output from a weak entropy source, together with a short, uniformly random seed, generates a highly random output that appears independent from the source and uniformly distributed.[1] Examples of weakly random sources include radioactive decay or thermal noise; the only restriction on possible source
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