Definition 1 A covering space of a topological space \(X\) is a topological space \(C\) together with a continuous surjective map \(p: C \to X\) such that for every point \(x \in X\), there exists an open neighborhood \(U\) of \(x\) such that \(p^{-1}(U) \cong F \times U\) for some discrete set \(F\) (called the fiber over \(x\)), and the map \(p\) restricted to each component of \(p^{-1}(U)\) is a homeomorphism onto \(U\).
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Автолюбителей предупредили о штрафе за неправильную тонировку14:52
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目前阿迪达斯的业务结构中，鞋类占比58%、服装占比35%、配饰占比7%。从增长情况来看，2025年鞋类产品增长12%、服装业务增长15%，配饰业务增长6%。