Density Perturbations: Relation to c/H & Scale Invariance

Discman
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Why have the density perturbations of all lengths a relation to the constant radius c/H? I suppose this is the origin for scale invariance and gaussianity.
 
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Discman said:
Why have the density perturbations of all lengths a relation to the constant radius c/H? I suppose this is the origin for scale invariance and gaussianity.
Can you be more specific? To what relation are you referring?
 

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