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Table 1 Summary of weighting strategies for the various non-parametric methods. For definition of notation, refer to the respective subsection.

From: Review on solving the inverse problem in EEG source analysis

Algorithm

Weight Matrix W

MNE

I 3 p

WMNE

Ω ⊗ I3

LORETA

(Ω ⊗ I3)ΔTΔ(Ω ⊗ I3)

Quadratic Regularization

∇

LAURA

W m A ⊗ I3