Los Alamos National Laboratory, Los Alamos, New Mexico, United States of America.|Department of Mathematical Sciences, Montana State University, Bozeman, Montana, United States of America.|Computer Science Department, Montana State University, Bozeman, Montana, United States of America.|Department of Mathematical Sciences, Montana State University, Bozeman, Montana, United States of America.|Department of Mathematical Sciences, Montana State University, Bozeman, Montana, United States of America.