In mathematics, a piecewise-defined function (also called a piecewise function, a hybrid function, or definition by cases) is a function defined by multiple sub-functions, where each sub-function applies to a different interval in the domain. Piecewise definition is actually a way of expressing the function, rather than a characteristic of the function itself.
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“Piecewise.” 2022. Wikipedia, December. https://en.wikipedia.org/w/index.php?title=Piecewise&oldid=1125037876.