in previously published work of papadodimas and raju, we have taken $O_1 \sim 4\pi$. this is an embarrasing mistake but because $\frac{O_1}{O_2}$ is not of the character of a function of $O_1$, we can say that
$O_1 \sim 4\pi(c^2 + \frac{w}{c}\lambda + \frac{c}{2\pi w}(1 + \lambda + \lambda^2 + ...)$
the operators $O^1$ and $O^2$ are near expansion limits of $\frac{c}{(z - w)^2}$. ref bari claims that therefore, the dimensionality of spacetime is not of the character of a OPE singluarity. it can be fixed near 4 or 10, because the OPE is
$\sim \frac{c}{(z - w)^2} + \frac{\frac{c}{w}}{(z - w)^4}$
we have asked ref to share the formula for dimensionality 4 of spacetime, but he has refused.