= Matter-spectrum response to extra dark energy
{title2=$P_m^{\rm new}/P_m^{\rm old}\simeq(D_{\rm new}/D_{\rm old})^2$}
With physical matter and radiation densities, primordial amplitudes and spatial flatness fixed, extra smooth late <dark energy> increases $H_0$ but keeps $\Omega_mH_0^2$ fixed. Provided the <dark energy> is negligible at equality, the early <cosmological transfer function> and equality wavenumber in physical units are unchanged. Earlier accelerated expansion suppresses the <linear growth factor>, lowering present dimensional matter power by its squared growth ratio. Units involving $h$ can additionally relabel the horizontal and vertical axes.
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