The study of missing point in GM(1,1) model

We use the class ratio theorem in grey system theory as a new approach for interpolation for a sequence which is incomplete in the GM(1,1) model. First, the class ratio theorems are presented in detail. Second, according to the class ratio theorem, two kinds of sequences in which there is one missing point are fully discussed, and we use the new approach to build up the criteria to find the missing point in the sequence. Finally two examples are given to show that our method is quite reasonable for finding the missing point in the GM(1,1) model.