Figure 2: The evolution of as a function of the comoving scale , using only the 5-year
WMAP CMB data. Red and yellow are the 95% and 68% confidence regions for the LV formalism.
Blue and purple are the same for the flow-equation formalism. From the outside inward, the colored
regions are red, yellow, blue, and purple. Image reproduced by permission from [475]; copyright by
APS.
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