Duality is studied for an abstract equilibrium problem which includes, among others, optimization problems and variational inequality problems. Follwing different schemes, various duals are proposed and primal-dual relationships are established under certaing generalized convexity and...

The paper illustrates a differential evolution (DE) algorithm to calculate the level-cuts of the fuzzy extension of a multidimensional real valued function to fuzzy numbers. The method decomposes the fuzzy extension engine into a set of "nested" min and max box-constrained op- timization...

One of the most pressing problems in the Latvian economy is related to the energy sector. The most characteristic feature is coupled with the low efficiency of thermal energy consumption of households as a result of poor insulation of existing buildings in Latvia. Solving energy sector problems...

Part 6 of network analysis illustrates the determination of efficient (optimal) minimum cost as the primary objective and its associated duration in relation to completion of a project in consideration of the crashed durations and cost slopes of activities, and the time based fixed cost, of a...

This section of Part 5 explores how the minimum duration of a project and its crashed cost in relation to the crashed cost of relevant activities and other cost or income, when the project is targeted to complete in its crashed duration. This part illustrates how the minimum duration and its...