$1\,/\,[1+e^{-(u+62)\,/\,6}]$ | and | $4e^{(u+90)/12}\,/\,[1+e^{-(u+62)\,/\,6}]$ |
to the new expressions: | ||
$0.25\;e^{-(u+90)/12}$ | and | $0.25\;e^{(u+62)/6}/e^{(u+90)/12}$ |
(thanks to Ehsan Mirzakhalili and Homero Barrocas Soares Esmeraldo) |
$\begin{split}\frac{du}{dt}&=f(u)-m,\\ \end{split}$ | (4.40) | ||
$\begin{split} \epsilon\frac{dm}{dt}&=-m+c(u).\\ \end{split}$ | (4.41) |
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