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math.CA2019
Lower bounds for estimates of the Schrödinger maximal function
Xiumin Du, Jongchon Kim, Hong Wang +1
We give new lower bounds for estimates of the Schrödinger maximal function by generalizing an example of Bourgain.
math.CA2018
Riesz means of Fourier series and integrals: Strong summability at the critical index
Jongchon Kim, Andreas Seeger
We consider spherical Riesz means of multiple Fourier series and some generalizations. While almost everywhere convergence of Riesz means at the critical index may fail f…
math.CA2017★ 18 cited
Some remarks on Fourier restriction estimates
Jongchon Kim
We provide refinements on some Fourier restriction estimates obtained using polynomial partitioning. Let be a compact surface with…