Solving problem of formula circle dependency by directed graph
Xiaozhi Zhang · 2004
The problem of formula circle dependency may exist in the formula set defined in the report form system by users. Finding the errors hiding in the formula set by an efficient method is a key technique in designing the report form system. How to solve the problem of formula circle dependency by directed graph is discussed. First, the problem of formula circle dependency in the report form system is proposed. Then, the formal definition of formula circle dependency by directed graph and relations in set theory is described. The method to judge formula circle dependency is proven. Finally, the algorithm to build the directed graph of formula circle dependency and the algorithm to solve the problem of formula circle dependency by directed graph are given.