Supported by NSFC(No.11201107,No.11271283,No.11501435);the Natural Science Basic Research Plan in Shaanxi Province of China(No.2016JM1013);the Starting Research Fund for Doctors of Xi'an Polytechnic University(No.BS1508)
Project supported in part by the Fundamental Research Funds for the Central Universities(No. 2010HGBZ0603);by NSFC(No.11071186 and No.11201107)
本文证明了如果λ_1,λ_2,…,λ_8为不全同号的非零实数,其中λ_1/λ_2为无理数,则对任意实数κ及0<σ<1/8,不等式|λ_1x_1~2+λ_2x_2~2+sum ( λ_ix_i^4+κ) from i=3 to 8|<(max 1≤i≤8 xi)^(-σ)有无穷多组整数解(x_1,x_2,…,x_8).