1. Mathematics Department, University of Iowa, Iowa City, Iowa, USA
2. Mathematics Department, San Diego State University, San Diego, California, USA
3. Mathematics Department, University of California, Irvine, Irvine, California, USA
4. Mathematics Department, Cal Poly Pomona, Pomona, California, USA
5. Mathematics & Computer Science Department, University of Guam, Mangilao, Guam
6. Mathematics Department, University of Hawai‘i at Hilo, Hilo, Hawaii, USA