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step function

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noun Mathematics.
  1. a function that is constant on each of a finite set of subintervals of its domain, the union of the subintervals being the domain.

Origin of step function

First recorded in 1925–30
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for step function

step function

noun
  1. an electrical waveform that rises or falls instantly from one level to another
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012