Erratum: The Λ-BMS₄ group of dS₄ and new boundary conditions for AdS₄ (Class. Quantum Grav. (2019) 36 (195017) DOI: 10.1088/1361-6382/ab3d4b)

The following types of [1] are corrected as follows: • In the second paragraph of section 2.2.2, after 'one gets' there should be G_ur + Λg_ur = R_ur − ¹₂Rg_ur + Λg_ur = ¹₂g_ur(2Λ − g^ABR_AB) = 0 so that we can solve equivalently g^ABR_AB = 2Λ. As a result, several other changes are needed later in the text: ∗ The sentence after equation (2.13) should be 'since the trace part of M^A_B has already been set to 2Λ in order to fix the radial dependence of V/r'. ∗ The sentence after equation (2.26) should be 'we extract the r-dependence of V/r thanks to M^A_A = 2Λ, which reads as'. Notice that (2.27) is nevertheless correct. • The last term of equation (2.28) should be +²_r^M instead of −²_r^M. • In the right-hand side of the first equation of (2.47), the last term should be +²₃^ΛC^C(^AH_C^B) instead of −²₃^ΛC^C(^AH_C^B). • The first equation of (B.5) should read as ^V_r = ^Λ₃ e^2β0r² + .... • In equation (B.7),