The Logarithmic derivative is also something that is surprisingly fundamental.
(ln(f))' = f'/f
In function theory you use it all the time. But people rarely notice, that it related to a logarithm.
Also the functions that have nice logarithmic derivative are a lot more interesting than expected. Nature is full of Gompertz functions. Once you're familiar with it, you see it everywhere.
(ln(f))' = f'/f
In function theory you use it all the time. But people rarely notice, that it related to a logarithm.
Also the functions that have nice logarithmic derivative are a lot more interesting than expected. Nature is full of Gompertz functions. Once you're familiar with it, you see it everywhere.