Functions of Two Variables. Functions of two variables can be visualized in many ways: heat maps in 2D, contour curves in 2D, ... To use 3D graphics in matplotlib, we first need to create an instance ...

James A. Clarkson, C. Raymond Adams, On Definitions of Bounded Variation for Functions of Two Variables, Transactions of the American Mathematical Society, Vol. 35, No. 4 (Oct., 1933), pp. 824-854 ...

82) defines a partition as dividing all real numbers into two classes; this enables him to use Dedekind's notation, when convenient, but it does not give a just idea of Dedekind's theory, and this ...