ln

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ln

$\includegraphics[height=10mm]{images/ln}% WIDTH=49 HEIGHT=45$

Produces a natural logarithm of the input, to the base of e. This takes the equation $$\log_{e}x$% WIDTH=79 HEIGHT=32$ where $x$% WIDTH=17 HEIGHT=16 is the input.

The operator can be placed on the canvas in two ways:

From the Functions (``function'') toolbar; or
By typing the letters ``ln'' on the canvas and then pressing the Enter key.