====== Logarithm ======

The inverse of an exponent.

\begin{align*}
\log_2(8) &= 3\\
      2^3 &= 8
\end{align*}

== Common Logarithm ==

Base 10.
$$\log(100) = 2$$

The LOG button on a calculator returns a common logarithm.\\
The Octave log10() function returns a common logarithm.

== Natural Logarithm ==

Base $e = 2.7183$, Euler's number.
$$\log(e^3) = 3$$

The LN button on a calculator returns a natural logarithm.\\
The Octave log() function returns a natural logarithm.


==== References ====
* https://www.mathsisfun.com/algebra/logarithms.html