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    • Sparse bounds for the discrete spherical maximal functions 

      Kesler, Robert; Lacey, Michael T.; Mena Arias, Darío Alberto (2020)
      We prove sparse bounds for the spherical maximal operator of Magyar, Stein and Wainger. The bounds are conjecturally sharp, and contain an endpoint estimate. The new method of proof is inspired by ones by Bourgain and ...