Odd propagation depths cause a significant validation-accuracy drop for unaugmented normalized-adjacency and random-walk propagation, whereas adding self-loops minimizes the negative high-frequency coefficients and prevents this degradation. · CiteArk
Odd propagation depths cause a significant validation-accuracy drop for unaugmented normalized-adjacency and random-walk propagation, whereas adding self-loops minimizes the negative high-frequency coefficients and prevents this degradation.
来源：paper:PDF p.14, Figure 4 and accompanying discussion
