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Whether it works in anti-de Sitter space, a curved spacetime used in holography, is unclear.","posed_since":"","precise":"Determine whether tree-level boundary correlators of gravitons in $\\mathrm{AdS}_{d+1}$ at all multiplicities, and at one loop, follow from gluon correlators by a color-to-kinematics replacement governed by a kinematic algebra that reduces to the flat-space BCJ structure in the flat-space limit. An answer is a general construction with proof, or a counterexample correlator.","problem_ref":null,"references":"","settled_by":"A proof for all multiplicities at tree level, or a correlator for which no double-copy form exists.","status_note":"Low-point tree-level examples in AdS and de Sitter exist; no general construction is established as of 2026.","title":"Double copy for scattering in anti-de Sitter 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