# Characteristic state function

{{ safesubst:#invoke:Unsubst||$N=Refimprove |date=__DATE__ |$B= {{#invoke:Message box|ambox}} }} The characteristic state function in statistical mechanics refers to a particular relationship between the partition function of an ensemble.
${\displaystyle P=\exp(-\beta Q)}$ or ${\displaystyle P=\exp(+\beta Q)}$