Fite and Kamenev type oscillation criteria for second order elliptic equations
Zhiting Xu · Annales Polonici Mathematici · 2007
Fite and Kamenev type oscillation criteria for the second order nonlinear damped elliptic differential equation $$ \sum_{i,j=1}^N D_i[a_{ij}(x)D_j y] + \sum_{i=1}^Nb_i(x)D_iy+p(x)f(y)=0 $$ are obtained. Our results are extensions of those for ordinary di