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A visual representation of the global sparse matrix Af with entries colored by absolute magnitude. (top) The full matrix Af colored by magnitudes ranging 0 to 10−3. (bottom) A decomposed matrix colored by magnitudes of each sub-block. In K in the upper-left block, the colorbar ranges from 0 to 10−3. In G in the upper-right block and D, in the lower-left block, the colorbar ranges from 0 to 10−5. In L in the lower-right block the colorbar ranges from 0 to 10−6.
