Funding for this research was provided by:
Deutsche Forschungsgemeinschaft (SFB/TR 45)
Simons Foundation (359425)
National Security Agency (H98230-16-1-0024)
National Science Foundation (DMS#1301848, DMS#1601144)
Alfred P. Sloan Foundation
Article History
Received: 22 April 2016
Revised: 12 January 2017
First Online: 10 May 2017