natural-logarithm

natural logarithm

noun Mathematics.
a logarithm having e as a base. Symbol: ln
Also called Napierian logarithm.


Origin:
1810–20

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Collins
World English Dictionary
natural logarithm
 
n
e Compare common logarithm Also called: Napierian logarithm a logarithm to the base e. Usually written loge or ln

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
natural logarithm  
A logarithm using base e. Natural logarithms are common in mathematics, especially in cases involving complex numbers. They are also called Napierian logarithms, after their inventor, English mathematician John Napier (1550-1617). See more at e. Compare common logarithm.
The American Heritage® Science Dictionary
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