natural logarithm
Napierian logarithm

He was the first to use the letter e for the base of the natural logarithm, now also known as Euler's number.

There are certain rules for integrating using e and the natural logarithm.

This is because there is no value for the natural logarithm of negative numbers.

I turned my head away and concentrated on remembering the natural logarithms from one to ten.

Max counted ten, then just to be sure, recalled the first dozen 7-place natural logarithms.

As an example, there are a number of simple series involving the natural logarithm.

This function can be used as the "anti-log" of a natural logarithm.

For example, will calculate 2.5*2 by adding their natural logarithms and print the answer.

A function giving the natural logarithm of its argument.

The constant e is the base of the natural logarithm.