‎In this paper‎, ‎we study the Neumann boundary value problem of a class of nonlinear divergence type diffusion equations‎. ‎By a priori estimates‎, ‎difference and variation techniques‎, ‎we establish the existence and uniqueness of weak solutions of this problem.

Software product lines are a widely accepted strategy to develop software products with variable features. Deriving a product line from existing customised product copies is still an open issue. Existing approaches try to extract encapsulated reusable components, or analyse features on a product management level. However, support for understanding implementation differences and designing variat...

Advertising is very important for the newsboy problem because the shelf-life of the newsboy product is short and advertisingmay increase sales to avoid overstocking. In this paper, models to study the effect of advertising are developed for the distribution-free newsboy problem where only the mean and variance of the demand are known. As in Khouja and Robbins (2003), it is assumed that the mean...