In this paper, we mainly use fractional power operator, successive approximation method and fixed point theorem to study the existence and uniqueness of mild solutions for nonautonomous neutral stochastic delay evolution equation in Hilbert spaces. Considering that the unbounded family of linear operators can generate a unique linear evolution system in Hilbert spaces, and the nonlinear term in the equation does not satisfy Lipschitz conditions, the equation is more suitable for practical application as a mathematical model.
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