Quadratic equations are polynomials, meaning strings of math terms. An expression like “x + 4” is a polynomial. They can have one or many variables in any combination, and the magnitude of them is ...

Journal of Political Economy, Vol. 79, No. 3 (May - Jun., 1971), pp. 481-507 (27 pages) The paper indicates how the Shephard duality theorem may be utilized in order to obtain a system of derived ...