Logarithm based on constant e. Write lnn (n >; 0)。 It is of great significance in physics, biology and other natural sciences. The general representation is lnx. Logx is also commonly used in mathematics to represent natural logarithm. In order to avoid confusion with the commonly used logarithm lgx based on 10, you can use "write all" ex.

Extended data begins to have the concept of logarithm at 16 14. Six years later, John Napier and Jost Bürgi published their own logarithmic tables. At that time, through a large number of exponentiation operations on the base close to 1, the logarithm of the specified range and precision and the corresponding real number were found, but there was no rational number at that time. William Jones (British mathematician) published the concept of power exponent in 1742.

According to the viewpoint of later generations, yost burgui's base number 1.000 1 is quite close to the base number e of natural logarithm, while John Napier's base number 0.9999999 is quite close to 1/E, so it is not necessary to do the difficult operation of higher power. It took John Napier 20 years to calculate the equivalent of a million times multiplication. Henry Briggs (mathematician) suggested that Napier use 10 as the base, but failed. He partially compiled the common logarithm table in 1624 by his own method.

Reference LN (natural logarithm) Baidu Encyclopedia