Generalization is a common thinking method in mathematics, which refers to the transition from considering an object or a group of fewer objects to considering a larger set containing a given object.

Generalization is an important way of thinking to put forward and solve mathematical problems. Some problems can be easily solved by generalization, because some problems already have general formulas and general solving steps. If a given problem can be reduced to this general form, then the problem will be solved accordingly. On the other hand, after generalizing the question, it is convenient to find the law from the universal connection and answer the question.