李嘉淦2014-10-272014-10-271972-06-??http://rportal.lib.ntnu.edu.tw/handle/20.500.12235/16893方程式X21＋X22＋＋……＋X2n＝a在有限體上之解的個數Number of solutions of the equation X21＋X22＋＋……＋X2n＝a in a finite field