1. Program in Applied and Computational Mathematics, Princeton University, Princeton, New Jersey 08544, USA
2. Laboratory of Computational Physics, Institute of Applied Physics and Computational Mathematics, Huayuan Road 6, Beijing 100088, People’s Republic of China
3. Department of Mathematics and Program in Applied and Computational Mathematics, Princeton University, Princeton, New Jersey 08544, USA; Center for Data Science and Beijing International Center for Mathematical Research, Peking University, Beijing, People’s Republic of China; and Beijing Institute of Big Data Research, Beijing 100871, People’s Republic of China