The universal <stress-tensor operator-product expansion> in a <two-dimensional conformal field theory> is
$$
T(z)T(w)\sim
\frac{c/2}{(z-w)^4}
+\frac{2T(w)}{(z-w)^2}
+\frac{\partial T(w)}{z-w}.
$$
Its fourth-order coefficient defines the <central charge> $c$.

Solution

Past exam of the mathematics course of the University of Cambridge / 2023 / iii / Paper 306 / 2 / a / Solution

 Solution

ID: past-exam-of-the-mathematics-course-of-the-university-of-cambridge/2023/iii/paper-306/2/a/solution