Abstract
The paper introduces a geometric feature of separability of graphs for extremum equality-type boundary problems. To find an optimal value for a problem with an almost separable graph, the paper presents an iteration algorithm, each step of which minimizes Lagrangian function for the main variable with a fixed Lagrangian multiplier. This algorithm dates back to Krasovskii extremal shift method from differential game theory.
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Kryazhimskii, A.V., Osipov, Y.S. Extremum Problems with Separable Graphs. Cybernetics and Systems Analysis 38, 175–194 (2002). https://doi.org/10.1023/A:1016387227459
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DOI: https://doi.org/10.1023/A:1016387227459