An arrow is a line, usually straight, capped at one end, or both ends, with an arrowhead which points in a specific direction. In a flowchart, arrows show the order in which instructions are to be performed (including where branching may occur) or they show the flow of cause and effect. In certain arrangements of numbers, such as the Collatz tree, arrows show which numbers are the input values, with the output value being pointed at by the arrowhead.

In writing about vectors, arrows can be written over the symbols for the origin and the endpoint, e.g., AB and CD. TeX provides commands for these.

An arrow, regarded as a morphismMathworldPlanetmath, functorMathworldPlanetmath or natural transformation also plays central roles in Category TheoryMathworldPlanetmathPlanetmathPlanetmathPlanetmath and Categorical Dynamics.

Title arrow
Canonical name Arrow
Date of creation 2013-03-22 12:55:46
Last modified on 2013-03-22 12:55:46
Owner PrimeFan (13766)
Last modified by PrimeFan (13766)
Numerical id 14
Author PrimeFan (13766)
Entry type Definition
Classification msc 00A99
Related topic Morphism
Related topic Functor
Related topic NaturalTransformation
Related topic Mapping
Related topic Vector
Related topic Category