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LucasBrown (talk | contribs) Changing short description from "Function that results in an exponential function when composed with itself" to "Functional square root of the exponential function" |
LucasBrown (talk | contribs) Changing short description from "Functional square root of the exponential function" to "Functional square root of an exponential" |
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{{Short description|Functional square root of
In [[mathematics]], a '''half-exponential function''' is a [[functional square root]] of an [[exponential function]]. That is, a [[function (mathematics)|function]] <math>f</math> such that <math>f</math> [[function composition|composed]] with itself results in an exponential function:{{r|sqrtexp|miltersen}}
<math display=block>f\bigl(f(x)\bigr) = ab^x,</math>
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