For functions of more than one variable, methods of proof for indeterminate limits are not as familiar as for functions of a single variable. We present a l’Hôpital’s rule that provides a way to ...

We present formulas that allow us to decompose a function ƒ of d variables into a sum of 2 d terms f u indexed by subsets u of {1,. . . , d}, where each term f u depends only on the variables with ...