Heuristics for the Process Network Synthesis Problem.- Heuristics for Simplified Process Network Synthesis (PNS) Problems with a Blossom-Type Algorithm for the Edge Covering Problem.- Lower and Upper Bounds on the Probability of the Union of Some Events with Applications.- The Linear Complementarity Problem and the Class of Generalized Positive Subdefinite Matrices.- Computer Experiences with Successive Regression Approximations for Solving Equations.- A Bundle of Smooth Lagrangians in Mathematical Programming.- A Nontopological Two-function Minimax Theorem with Monotone Ttansformations of the Functional Values.- Non-smooth Optimization with Randomization.- The Sherman-Morrison Formula for the Determinant and its Application for Optimizing Quadratic Functions on Condition Sets Given by Extreme Generators.- Duality For D.C. Optimization Over Compact Sets.- Characterization of Monotone Operators by Using a Special Class of Preinvex Functions.- Two Approaches for Parallelizing the UEGO Algorithm.- Convexification of Functions by Nonlinear Coordinate Transformations.- Packing Equal Circles in a Square I. — Problem Setting and Bounds for Optimal Solutions.- Packing Equal Circles in a Square II. — New Results for up to 100 Circles Using the TAMSASS-PECS Algorithm.- On Duality for Quasi-convex Supremization and Reverse Convex Infimization.- A Minimization Problem in Function Spaces.