For example, Tao Xingzhi's educational masterpieces, Dreams of New Education, Education and a Better Life, Tomorrow's School and other works related to teaching content.
Monographs, Chinese vocabularies and Chinese Pinyin are called zhuān zhù, which refers to a special research topic and is another name for works. According to the length of academic papers, it can be divided into three types: single academic paper, series academic papers and academic monographs. Generally speaking, 40,000-50,000 words or more can be called academic monographs.
About mathematics:
Mathematics is a universal means for human beings to strictly describe the abstract structure and mode of things, and can be applied to any problem in the real world. All mathematical objects are artificially defined in essence. In this sense, mathematics belongs to formal science, not natural science. Different mathematicians and philosophers have a series of views on the exact scope and definition of mathematics.