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- W1599486150 abstract "Infinite-dimensional gradient method is constructed for nonlinear fourth order elliptic BVPs. Earlier results on uniformly elliptic equations are extended to strong nonlinearity when the growth conditions are only limited by the Hilbert space well-posedness. The obtained method is opposite to the usual way of first discretizing the problem. Namely, the theoretical iteration is executed for the BVP itself on the continuous level in the corresponding Sobolev space, reducing the nonlinear BVP to auxiliary linear problems. Thus we obtain a class of numerical methods, in which numerical realization is determined by the method chosen for the auxiliary problems. The biharmonic operator acts as a Sobolev space preconditioner, yielding a fixed ratio of linear convergence of the iteration (i.e. one determined by the original coefficients only, independent of the way of solution of the auxiliary problems), and at the same time reducing computational questions to those for linear problems. A numerical example is given for illustration." @default.
- W1599486150 created "2016-06-24" @default.
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- W1599486150 date "2001-01-01" @default.
- W1599486150 modified "2023-10-03" @default.
- W1599486150 title "Sobolev Space Preconditioning of Strongly Nonlinear 4th Order Elliptic Problems" @default.
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- W1599486150 doi "https://doi.org/10.1007/3-540-45262-1_53" @default.
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