Funding for this research was provided by:
Division of Mathematical Sciences (DMS-1451191)
Division of Computing and Communication Foundations (CCF-1523816, 1350572)
Division of Computing and Communication Foundations (CCF-1350572)
National Science Foundation (CCF-1540634)
Article History
Received: 1 March 2017
Revised: 23 September 2018
Accepted: 28 September 2018
First Online: 24 October 2018