natural logarithm

From New Latin log naturalis, coined in 1668 by Nicholas Mercator in his book Logarithmo-technica.

natural logarithm (plural natural logarithms)

1. (mathematics) The logarithm in base e; either the function that given ${\displaystyle x\!}$ returns ${\displaystyle y\!}$ such that ${\displaystyle e^{y}=x\!}$ or the value of ${\displaystyle y\!}$ .

   The natural logarithm can be used to integrate 1/x.

• hyperbolic logarithm, ln, natural log

• common logarithm
• logarithm

• ln