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Constructible topology
From Wikipedia, the free encyclopedia
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In commutative algebra, the constructible topology on the spectrum of a commutative ring is a topology where each closed set is the image of in for some algebra B over A. An important feature of this construction is that the map is a closed map with respect to the constructible topology.
With respect to this topology, is a compact,[1] Hausdorff, and totally disconnected topological space (i.e., a Stone space). In general, the constructible topology is a finer topology than the Zariski topology, and the two topologies coincide if and only if is a von Neumann regular ring, where is the nilradical of A.[2]
Despite the terminology being similar, the constructible topology is not the same as the set of all constructible sets.[3]
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