Spectrum of a ring
Set of a ring's prime ideals / From Wikipedia, the free encyclopedia
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For the concept of ring spectrum in homotopy theory, see Ring spectrum.
In commutative algebra, the prime spectrum (or simply the spectrum) of a commutative ring R is the set of all prime ideals of R, and is usually denoted by ;[1] in algebraic geometry it is simultaneously a topological space equipped with the sheaf of rings .[2]