27 research outputs found

    New results in the perturbation theory of maximal monotone and MM-accretive operators in Banach spaces

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    Sets in the ranges of nonlinear accretive operators in Banach spaces

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    Let X be a real Banach space and G ⊂ X open and bounded. Assume that one of the following conditions is satisfied: (i) X* is uniformly convex and T:Ḡ→ X is demicontinuous and accretive; (ii) T:Ḡ→ X is continuous and accretive; (iii) T:X ⊃ D(T)→ X is m-accretive and Ḡ ⊂ D(T). Assume, further, that M ⊂ X is pathwise connected and such that M ∩ TG ≠ ∅ and MT(G)=M ∩ \overline{T(∂ G)} = ∅. Then MTGM ⊂ \overline{TG}. If, moreover, Case (i) or (ii) holds and T is of type (S1)(S_1), or Case (iii) holds and T is of type (S2)(S_2), then M ⊂ TG. Various results of Morales, Reich and Torrejón, and the author are improved and/or extended

    A boundary value problem on an infinite interval

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