In mathematics, Einstein function is a name occasionally used for one of the functions

${\displaystyle {\frac {x^{2}e^{x)){(e^{x}-1)^{2))))$

${\displaystyle {\frac {x}{e^{x}-1))}$

${\displaystyle \log(1-e^{-x})}$

${\displaystyle {\frac {x}{e^{x}-1))-\log(1-e^{-x})}$