An idea for determination of zeros of complex differential equations
The research of complex differential equations regarding to zero solutions is very important, because zero function in a way symbolizes oscillation. Unlike Rolf Nevannlina's classical theory on evaluation of the number of zeros of the entire analytical function, and the entire solutions of complex differential equations, this paper suggests searching and finding of zero locations by simplified, generalized and accessible Sturm's theorems on the locations of zero solutions of oscillatory equations (but without theory of groups). This paper is an introductory work into the whole problem of zero locations of complex differential equations. After the year 2000, the authors have noticed over 50 works about the evaluation of supremum of the number of zero solutions of complex differential equations, but they are of Nevannlina-type and do not contain any essential novelties