Definition:Logarithm/Historical Note

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Historical Note on Logarithm

The initial invention of the logarithm was by John Napier, who used a base $\dfrac {9 \, 999 \, 999} {10 \, 000 \, 000}$.

William Oughtred, who invented the slide rule, added a table of natural logarithms to his English translation of Napier's book.

In $1685$, John Wallis established that logarithms can be considered as exponents.

In $1694$, Johann Bernoulli made the same discovery.

Logarithms in their modern form are as a result of the original work done by Leonhard Paul Euler.

Euler was the first one to create a consistent theory of the logarithm of a negative number and of an imaginary number.

He also discovered that the logarithm function has an infinite number of values for a given argument.