Spectrum (topology)
= Spectrum
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{title2=$E$}
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= Topological spectrum
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= Topological spectra
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A sequential model of a <topological spectrum> consists of <based spaces> $E_j$ and structure maps $S^1\wedge E_j\to E_{j+1}$. Indexed models use finite-dimensional subspaces of a <universe for spectra> and structure maps $S^{W\ominus V}\wedge E(V)\to E(W)$. Different standard models present the same <stable homotopy category>.