Isotropic geometry of graph surfaces associated with product production   functions in economics
  A production function is a mathematical formalization in economics which denotes the relations between the output generated by a firm, an industry or an economy and the inputs that have been used in obtaining it. In this paper, we study the product production functions of 2 variables in terms of the geometry of their associated graph surfaces in the isotropic 3-space I^{3}. In particular, we derive several classification results for the graph surfaces of product production functions in I^{3} with constant curvature. 
Muhittin Evren Aydin, Mahmut Ergut
math.DG