Ye, Xiu http://orcid.org/0000-0002-1559-3836
Zhang, Shangyou http://orcid.org/0000-0002-1114-4179
Funding for this research was provided by:
Division of Mathematical Sciences (DMS-1620016)
NSFC
Peer Review Statement: The publishing and review policy for this title is described in its Aims & Scope.
Publication History
Received: 2017-08-07
Revised: 2017-11-27
Accepted: 2018-01-19
Published: 2018-03-07