Funding for this research was provided by:
Directorate for Computer and Information Science and Engineering (CCF-1111257, CCF-1562041)
Directorate for Computer and Information Science and Engineering (CCF- 1553751)
Directorate for Mathematical and Physical Sciences (DMS-0902962)
Alfred P. Sloan Foundation
Simons Foundation
John D. and Catherine T. MacArthur Foundation
Article History
Received: 18 August 2020
Revised: 13 December 2021
Accepted: 16 December 2021
First Online: 18 February 2022
Declaration
:
: The original version of this paper was posted to arXiv in 2015 as paper number <i>1504.00350</i>. This version is a substantial revision of the original.