# natural logarithm

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## natural logarithm

a logarithm to the base e (see e (sense 1)). Usually written log

_{e}or ln## Natural Logarithm

a logarithm whose base is the number *e* = 2.71828 .... The first tables of natural logarithms of numbers from 1 to 1,000 were published by the British mathematician J. Speidell in *New Logarithmes* (1619). The name “natural logarithm” is due to the German scientist N. Mercator (1668). The natural logarithm of the number *N* is denoted by In *N*.

## natural logarithm

[′nach·rəl ′läg·ə‚ri__th__·əm]

(mathematics)