Virasoro: [L_m,L_n] = (m−n)L_{m+n} + (c/12)m(m²−1)δ_{m+n,0}

Virasoro algebra — the infinite-dimensional central extension of the Witt algebra of holomorphic vector fields on the punctured complex plane. Modes L_n of the 2D holomorphic stress tensor T(z) = Σ_n L_n z^{−n−2} obey [L_m, L_n] =…