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center o bass

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In other words, the normalised mass variance over a sphere of radius the horizon distance should be independent of time. So if we computed the mass variance at some time ##t_0## when the horizon was ##R_H(t_0)## this should be the same as if we computed it at any other ##t_1## when the horizon was ##R_H(t_1)## even though ##R_H(t_0)## might be much smaller than ##R_H(t_1)##.

I am trying to get intuition for why one would believe such a requirement to be true. Does anyone have some enlightening explanations/insights?