There is no definition unanimously accepted for Decision Support System. First definitions were given around 1970 and were pretty broad. In this article we will analyse some of the most important decision support systems’ definitions and we will overview the main characteristics of this type...

The computational time required by interior-point methods is often dominated by the solution of linear systems of equations. An efficient specialized interior-point algorithm for primal block-angular problems has been used to solve these systems by combining Cholesky factorizations for the block...