Characterizations of adjacency of faces of polyhedra -- Linear programming by an effective method using triangular matrices -- Minimal cost flows in regular matroids -- Lagrangean functions and affine minorants -- Khachiyanโ{128}{153}s algorithm for linear programming -- Higher order necessary conditions for an abstract optimization problem -- On the structure of the monotone asymmetric travelling salesman polytope II: Hypotraceable facets -- Algorithmic versus axiomatic definitions of matroids -- Characterization of facets for multiple right-hand choice linear programs -- Secant approximation methods for convex optimization -- First and second order sufficient optimality conditions in mathematical programming and optimal control -- Global and superlinear convergence of a class of variable metric methods -- Some continuity properties of polyhedral multifunctions -- On conditions warranting ?-subdifferentiability -- On self-transformable combinatorial problems -- A resource decomposition algorithm for general mathematical programs