OR rule for nodewise graph selection
= OR rule for nodewise graph selection
{c}
{title2=$\{j,k\}\in\widehat E\iff\widehat\theta_{jk}\ne0\text{ or }\widehat\theta_{kj}\ne0$}
= Nodewise graph union rule
{synonym}
The union rule retains an edge whenever either of the two <nodewise regression> fits selects the other variable. It is more inclusive than the <AND rule for nodewise graph selection> and makes an undirected edge decision from potentially asymmetric estimated neighbourhoods.