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Definition

Natural Logarithmic Function

The natural logarithmic function is a specific logarithmic function where the base is the mathematical constant ee. It is defined as f(x)=logexf(x) = \log_e x, where x>0x > 0. However, this function is generally written using the special notation f(x)=lnxf(x) = \ln x, which is read as "el en of xx". As with all basic logarithmic equations, the equation y=lnxy = \ln x is mathematically equivalent to its corresponding exponential form, x=eyx = e^y.

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Updated 2026-05-25

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