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Joint norm of operators and an investigation of nonlinear problems - MaRDI portal

Joint norm of operators and an investigation of nonlinear problems (Q757813)

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scientific article; zbMATH DE number 4194535
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Joint norm of operators and an investigation of nonlinear problems
scientific article; zbMATH DE number 4194535

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    Joint norm of operators and an investigation of nonlinear problems (English)
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    1990
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    Nonlinear operator equations of the type \(x=Fx\) in a real Hilbert space H are considered. If \(\| Fx\| \leq \| B_ 1x\| +\| B_ 2x\| +b,\) where \(B_ 1\) and \(B_ 2\) are bounded linear operators there is a simple condition for solvability \(\| B_ 1\| +\| B_ 2\| <1\). This condition is generalized and applications to two- point boundary value problems are given.
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    joint norm of operators
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    Nonlinear operator equations
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    two-point boundary value problems
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