设D是不能被3整除的正整数.证明了:当D〉10^6时,如果Pell方程U^2-DV^2=-1有解(U,V),则方程x^2-D=3^n至多有两组正整数解(x,n).故而改进了已有的结果.
Let Dbe a positive integer with D 0(mod 3).In this paper,we prove that if D10^6 and the Pell equation U^2-DV^2=-1has solutions(U,V),then the equation x^2-D=3^n has at most two positive integer solutions(x,n).This result constitutes an improvement upon that of intrinsic result.