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Flowgorithm is a graphical authoring tool which allows users to write and execute programs using flowcharts. The approach is designed to emphasize the algorithm rather than the syntax of a specific programming language. [ 1 ]
Centered square numbers, highlighted in red, are in found in the center of the odd rows, and are the sum of successive squares – taking 25 as an example, it is the sum of 16 (rotated yellow square) and the next smaller square, 9 (sum of blue triangles)
Signal-flow graph connecting the inputs x (left) to the outputs y that depend on them (right) for a "butterfly" step of a radix-2 Cooley–Tukey FFT. This diagram resembles a butterfly (as in the morpho butterfly shown for comparison), hence the name, although in some countries it is also called the hourglass diagram.
The reverse-and-add process produces the sum of a number and the number formed by reversing the order of its digits. For example, 56 + 65 = 121. As another example, 125 + 521 = 646. Some numbers become palindromes quickly after repeated reversal and addition, and are therefore not Lychrel numbers.
On finite lists, that means that left-fold and reverse can be composed to perform a right fold in a tail-recursive way (cf. 1 +> (2 +> (3 +> 0)) == ((0 <+ 3) <+ 2) <+ 1), with a modification to the function f so it reverses the order of its arguments (i.e., foldr f z == foldl (flip f) z. foldl (flip (:)) []), tail-recursively building a ...
Burnley's Hannibal Mejbri competes against Preston North End players during the Sky Bet Championship match at Deepdale in Preston, England, on Saturday, Feb., 15, 2025.
RAPTOR, the Rapid Algorithmic Prototyping Tool for Ordered Reasoning, [1] is a graphical authoring tool created by Martin C. Carlisle, Terry Wilson, Jeff Humphries and Jason Moore.
In number theory, reversing the digits of a number n sometimes produces another number m that is divisible by n. This happens trivially when n is a palindromic number; the nontrivial reverse divisors are 1089, 2178, 10989, 21978, 109989, 219978, 1099989, 2199978, ... (sequence A008919 in the OEIS).