&gt; Here we&#x27;re talking about mapping data into a high dimensional space, then trying to project that down to the minimum dimension space that can preserve the relevant information.<p>Isn&#x27;t this what M&#x2F;PCA is all about? <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Principal_component_analysis" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Principal_component_analysis</a> and <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Multilinear_principal_component_analysis" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Multilinear_principal_componen...</a>