Hu, W. http://orcid.org/0000-0002-6116-9104
Šverák, V. http://orcid.org/0000-0003-4442-2654
Funding for this research was provided by:
Directorate for Mathematical and Physical Sciences (DMS 1159376, DMS 1362467)
Article History
Received: 12 October 2016
Accepted: 16 January 2018
First Online: 25 January 2018