Explore top gifts · Shop stocking stuffers. Mathematics for Economists principal textbook: Sydsæter, Hammond, Strłm, Carvajal (), Essential Mathematics for Economic Analysis, 5th ed. (older editions are equally suitable) The . [1]Knut Sydsæter and Peter Hammond. Essential Mathematics for Eco-nomics Analysis. Prentice Hall, 3rd edition, [2]Knut Sydsæter, Peter Hammond, Atle Seierstad, and Arne Strøm. .