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Interaction between groundwater and surface water: proceedings of the symposium, held in Ystad, Sweden, May 30-June 3, 1988
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摘要
This paper generalizes the optimality condition expressed by the Euler-Lagrange equation for classical calculus of variations. In the case of conjunctive management the generalized Euler-Lagrange equation is an integral equation or integral equation inequality.
    Constrained calculus of variations for optimization of conjunctive use of surface and ground waters.

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