Conformal time
= Conformal time
{wiki}
Conformal time satisfies $d\tau=dt/a(t)$ and factors the FLRW metric into $a^2(\tau)$ times a static conformal metric.
= Conformal time
{wiki}
Conformal time satisfies $d\tau=dt/a(t)$ and factors the FLRW metric into $a^2(\tau)$ times a static conformal metric.