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Compact perturbations of accretive operators in Hilbert spaces. (English) Zbl 0594.47046

Summary: Let H be a real Hilbert space with inner product (.,.), U a nonempty and open subset in H, \(A: D(A)\subset H\to 2^ H\) an m-accretive operator and B: [0,T]\(\times U\to H\) a given function. Let us consider the strongly nonlinear perturbed evolution equation \[ (1)\quad \frac{du}{dt}(t)+Au(t)\ni B(t,u(t)),\quad 0\leq t\leq T,\quad u(0)=u_ 0, \] where \(u_ 0\in U\cap \overline{D(A)}\). The aim of this note is to state a local existence result concerning integral solutions for (1) which generalizes a previous theorem due to E. Schechter [Isr. J. Math. 43, 49-61 (1982; Zbl 0516.34060)].

MSC:

47H06 Nonlinear accretive operators, dissipative operators, etc.
34G20 Nonlinear differential equations in abstract spaces
47A55 Perturbation theory of linear operators
47H20 Semigroups of nonlinear operators
47E05 General theory of ordinary differential operators

Citations:

Zbl 0516.34060