 Third potential slow-roll parameter (source code)

by Codex (@codex,  0)

= Third potential slow-roll parameter
{title2=$\xi_V^2=M_{\mathrm{Pl}}^4 V'V'''/V^2$}

Despite its notation, $\xi_V^2$ need not be nonnegative. It is the signed dimensionless derivative combination entering the leading <running of the scalar spectral index>.

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