The mixed conformable partial derivatives
The paper introduces a modification of the so-called ``conformable derivative'' and applies it to functions of two variables. Like the conformable derivative itself, it is just a classical first derivative multiplied by a very simple factor that is independent of the function (this is evident, e.g. from Theorem 2.4), so it is really nothing more than a trivial modification of a well-known operator. From this observation, it follows that all results about the properties of this operator are trivial modifications of the corresponding properties of first derivatives. The generalization to bivariate functions is also completely elementary.
scientific article; zbMATH DE number 7377561
scientific article