Generalization of the Logarithm Function and of the Exponential Function with Arbitrary Base

The logarithm function and the exponential function are, by nature, base dependent. Thus, in this paper I introduces an arbitrary base in the logarithm and exponential functions, both dependent on $q$, in order to have ${\log }_a(x;q)$ and $a_q^x$. Some of the properties of these functions had been analyzed. The logarithm function was applied to the entropy which resulted in the $S_q=k[1-{\sum }_{i=1}^W{p}_i^q]\mathrm{/}[1-e^{1-q}]$ expression.