2 problems

Bern–Carrasco–Johansson colour–kinematics duality conjecture. There exists a choice of kinematic numerators for the trivalent diagrams entering $\scA_{n,L}$ such that whenever a tr…

BCJ double-copy conjecture. Graviton scattering amplitudes can be obtained from the Yang–Mills amplitudes by a simple squaring procedure once a set of colour-kinematics-dual Yang–M…