1.NounThe logarithm in base .mw-parser-output .texhtml{font-family:"Nimbus Roman No9 L","Times New Roman",Times,serif;font-size:118%;line-height:1;white-space:nowrap;font-feature-settings:"lnum","tnum","kern"0;font-variant-numeric:lining-nums tabular-nums;font-kerning:none}.mw-parser-output .texhtml .texhtml{font-size:100%}e: either the function that given x returns y such that e = x, or the value of y given by the function.
"The natural logarithm can be used to integrate ⁄x."