Funding for this research was provided by:
Division of Mathematical Sciences (1522777, 1818924)
Division of Mathematical Sciences (1620047)
Air Force Office of Scientific Research (FA9550-18-1-0257)
Article History
Received: 23 August 2018
Revised: 6 November 2018
Accepted: 27 November 2018
First Online: 18 December 2018