Helton, J. William
Pascoe, J. E.
Tully-Doyle, Ryan
Vinnikov, Victor
Funding for this research was provided by:
Division of Mathematical Sciences (DMS-1201498, DMS-1361720)
Ford Motor Company
Israel Science Foundation (322/00)
Article History
Received: 7 February 2015
Revised: 13 September 2016
First Online: 5 October 2016