The Donfagsiteli conditional function ([Cdk]f) is a set of classes and families of mathematical functions which have been recently deﬁned. [Cdk]f is related to a predeﬁned function f in a way similar to that of a bijective function and its inverse . It is a generalization of both elementary and special functions. The function has many applications in pure and applied sciences, when makes it possible, to solve explicitly several models where as this is not possible with elementary and some special functions such as Lambert W functions. In this book chapter, deﬁnition and properties of Donfagsiteli conditional function, have been revisited with their extension to the conditional complex plan. Some transcendental equations and novel models were treated to solve certain problems in biology such as enzymatic kinetics and marginal value theorem. [Cdk]f is a tool to provide deeper insight and a new point of view when describing natural phenomena.
Nehemie Donfagsiteli Tchinda
Medicinal Plants and Traditional Medicine Research Centre, Institute of Medical Research and Medicinal Plants Studies (IMPM), Yaounde, Cameroon.
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