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Module spectrum
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<p>In algebra, a module spectrum is a <a href="/facts/Spectrum_(topology)/mWho3roy">spectrum</a> with an action of a <a href="/facts/Ring_spectrum/fB4IaL5T">ring spectrum</a>; it generalizes a <a href="/facts/Module_(mathematics)/jP0LIhFL">module</a> in abstract algebra. </p><p>The ∞-category of (say right) module spectra is <a href="/facts/Stable_%25E2%2588%259E-category/AlFqNnM9">stable</a>; hence, it can be considered as either analog or generalization of the <a href="/facts/Derived_category/pBQHnFYo">derived category</a> of modules over a ring. </p>