仉志余

Zhang Zhiyu is a writer of mathematics textbooks about whom limited public information is available. His confirmed works are three volumes in the "Applied College Mathematics Course (Third Edition)" series: Advanced Mathematics (Volume 1), Advanced Mathematics (Volume 2), and Linear Algebra. Judging from the titles and the division into volumes, the series is designed for basic college mathematics courses, with an emphasis on application. It covers the two main areas of calculus and linear algebra, presented in separate volumes so that they can be used according to semester or course arrangements. In common classifications, these works are placed in the exam category, which suggests that, in addition to serving classroom learning, they may also be used by readers for exam review, organizing key knowledge points, and practicing problem-solving methods. Because no reliable public sources are available for the author's biography, nationality, or professional positions, this introduction makes no conjectures and presents only the textbook-writing orientation shown by the works in the database: taking course application as the main thread, combining basic concepts with computational training, and making the books suitable as teaching or self-study references for introductory college mathematics.