The spectrum of a ring, denoted as Spec(R), is the set of all prime ideals of the ring R, equipped with the Zariski topology. This concept links algebra and geometry by allowing us to treat the prime ideals of a ring as geometric points, which correspond to the affine varieties associated with the ring. The spectrum provides a way to study the properties of rings through their prime ideals and forms the basis for understanding affine varieties in algebraic geometry.
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