Image: Langevin function
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Description: Langevin function (red line), compared with tanh(x/3){\displaystyle tanh(x/3)} (blue line)
Title: Langevin function
Credit: Transferred from en.wikipedia to Commons by Pieter Kuiper using CommonsHelper.
Author: Ddcampayo at English Wikipedia
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License: CC BY-SA 3.0
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