A note on equidistribution on a product of Shimura curves and André–Oort

In this short note we show that Galois orbits of CM points equidistribute on a product of r 2 r ⩾ 2 non-isomorphic Shimura curves by applying the adelic toral-packet equidistribution theorem of Aka–Luethi–Michel–Wieser. As a consequence, we deduce André–Oort for the product of those curves, previously studied by Edixhoven and Yafaev, replacing GRH by a Linnik-type splitting condition at two auxiliary primes.