biexponential

English

Etymology

From bi- +‎ exponential

Adjective

biexponential (not comparable)

(mathematics) Having two summed exponential terms.

Usage notes

A biexponential equation/function/curve/model/distribution is the sum of two exponential ones. In specific, a biexponential model has the form

$y=a_{1}e^{-b_{1}{\text{ }}t}+a_{2}e^{-b_{2}{\text{ }}t}$

Biexponential time-series models commonly find use in pharmacokinetics.
In statistics, the biexponential distribution $Y=p\lambda 1e^{-\lambda 1{\text{ }}X}+(p-1)\lambda 2e^{-\lambda 2{\text{ }}X}$ , where $0<p<1$ , is a mixture distribution of two exponential distributions.

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