Given quantity of ergodic process,
why does the following identity hold?
<f> means the ensemble average
f_head means the time average
<f>_head=<f_head>
where
<f>=integrate f(Pk,Qk) over all the possible mircostate
f_head=integrate f(Pk,Qk) along the trajactory of the system
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 61.230.124.40