Klein, a British mathematician, pointed out that the progress of algebra is due to the introduction of a better symbol system, which is more important for its own development and analysis than the technological progress in the16th century. In fact, only by taking this step can algebra become a science.

A large number of operations and reasoning in mathematics are carried out through mathematical symbols. Mathematical symbol is a special mathematical language, which can clearly express mathematical concepts, operation processes and human thinking processes. It plays a time-saving role in narration, and can also accurately and profoundly express the relationship between certain concepts, methods and logic. Leibniz, a great German mathematician, said: "The originality of symbols (referring to mathematical symbols) and the art of symbols are wonderful assistants for people, because they save thinking work ... facilitate explanation and save thinking in an amazing way." Russian mathematician Lobachevsky also said that the language of mathematical symbols provides a more perfect, accurate and clear way to convey some concepts to others.