where <math>\ln{a}</math> is the [[natural logarithm]] for ''a''.
where <math>\ln{a}</math> is the [[natural logarithm]] for ''a''.
−
The [[transcendental number]] ''[[e]]'' (2.7182818...) has the property that the [[derivative]] of the function ''e''<sup>''x''</sup> is ''e''<sup>''x''</sup>, since ln ''e'' = 1. This function is thus important in the solution of many types of differential equations. ''e'' is the canonical exponential function.
+
The [[transcendental number]] ''[[e]]'' (2.7182818...) has the property that the [[Derivative (calculus)|derivative]] of the function ''e''<sup>''x''</sup> is ''e''<sup>''x''</sup>, since ln ''e'' = 1. This function is thus important in the solution of many types of differential equations. ''e'' is the canonical exponential function.