Map of topological spectra
= Map of topological spectra
{title2=$u:D\to E$}
= Maps of topological spectra
{synonym}
= Map of spectra
{synonym}
= Maps of spectra
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A <map of topological spectra> is a compatible family of based maps of the level spaces: $u_{j+1}\sigma_j^D=\sigma_j^E(1\wedge u_j)$. It is distinct from its class in the <stable homotopy category>.