| Affiliation: | 1. Department of Mathematics and Computer Science, University of Lethbridge, Lethbridge, Alberta, T1K 3M4, Canada;2. Department of Mathematics, National Defense Academy of Japan, Yokosuka, Kanagawa, 239-8686, Japan;1. Instituto Universitario de Matemáticas y Aplicaciones de Castellón and Departamento de Matemáticas, Universitat Jaume I, Campus de Riu Sec. 12071 Castelló, Spain;2. Instituto de Matemáticas (Imuva) and Departamento de Matemática Aplicada, Universidad de Valladolid, Avda Salamanca SN, 47014 Valladolid, Spain;1. Department of Mathematics, Faculty of Mathematics and Physics, Charles University, Sokolovská 83, 186 75 Prague 8, Czech Republic;2. Institut de Mathématiques de Toulon, campus La Garde, 83041 Toulon, France;1. College of Liberal Arts and Sciences, National University of Defense Technology, Changsha, China;2. School of Mathematics and Statistics, Hunan University of Technology and Business, Changsha, China;3. State Key Laboratory of Cryptology, Beijing, 100878, China |
