The editor of Russian
translation Elena Smirnova.

This volume presents mathematical formulas and theorems common to economics. It includes both formulas like Roy's identity that are peculiar to economics and formulas like Leibniz's rule that are common to many areas of applied mathematics. The volume is meant to be a reference work, to be used by the graduate student in conjunction with a textbook and by the researcher in need of exact statements of mathematical results. The volume is the first grouping of this material for a specifically economist audience. This third edition is extensively revised and contains more than 250 new formulas, as well as many new figures.