deletions | additions       diff --git a/text_xi__k_eta__k__.tex b/text_xi__k_eta__k__.tex  index 22766f8..24e646e 100644  --- a/text_xi__k_eta__k__.tex  +++ b/text_xi__k_eta__k__.tex 
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e_{k+1} = x_{k+1}-x_{k+1}^{opt}  $$  \text {  Подставляя \ref{optim} (\ref{optim})  в данное выражение получаем: }  $$  e_{k+1} = (1-K_{k+1})(e_{k+1}+\xi_{k+1})-K_{k+1}\cdot\eta_{k+1}