Author: Amartya Format: MarkdownItexMinor corrections in the maps and the diagrams.
<a href="https://ncatlab.org/nlab/revision/diff/orthogonal+spectrum/24">diff</a>, <a href="https://ncatlab.org/nlab/revision/orthogonal+spectrum/24">v24</a>, <a href="https://ncatlab.org/nlab/show/orthogonal+spectrum">current</a>