Affiliation: | 1. Department of Mathematics, Brigham Young University, Provo, UT 84602, United States;2. Department of Mathematics, Iowa State University, Ames, IA 50010, United States;3. Department of Mathematics, San Jose State University, San Jose, CA 95192, United States;4. Mathematics Department, Willamette University, Salem, OR 97301, United States;5. Mathematics Program, College of Arts and Sciences, Eastern Oregon University, La Grande, OR 97850, United States |