  One can obtain exact information about Virasoro conformal blocks by
analytically continuing the correlators of degenerate operators. We argued in
recent work that this technique can be used to explicitly resolve information
loss problems in AdS$_3$/CFT$_2$. In this paper we use the technique to perform
calculations in the small $1/c \propto G_N$ expansion: (1) we prove the
all-orders resummation of logarithmic factors $\propto \frac{1}{c} \log z$ in
the Lorentzian regime, demonstrating that $1/c$ corrections directly shift
Lyapunov exponents associated with chaos, as claimed in prior work, (2) we
perform another all-orders resummation in the limit of large $c$ with fixed
$cz$, interpolating between the early onset of chaos and late time behavior,
(3) we explicitly compute the Virasoro vacuum block to order $1/c^2$ and
$1/c^3$, corresponding to $2$ and $3$ loop calculations in AdS$_3$, and (4) we
derive the heavy-light vacuum blocks in theories with $\mathcal{N}=1,2$
superconformal symmetry.
