It should be noted, too, that although it is confessedly incomplete, the discussion of maxima and minima of functions of two or more variables is satisfactory as far as it goes, a most unusual ...

J. F. Ritt, On a Certain Ring of Functions of Two Variables, Transactions of the American Mathematical Society, Vol. 32, No. 2 (Apr., 1930), pp. 155-170 ...

James A. Clarkson, C. Raymond Adams, On Definitions of Bounded Variation for Functions of Two Variables, Transactions of the American Mathematical Society, Vol. 35 ...

Functions of Two Variables Functions of two variables can be visualized in many ways: heat maps in 2D, contour curves in 2D, wireframes in 3D, surfaces in 3D. We begin by defining a function of two ...

Multivariable Calculus The techniques of 100-level calculus are applied and extended in the study of infinite series, vector-valued functions and functions of two or more variables. Topics include ...