To enroll in the MAT1071 Mathematics 1, MAT1821 Mathematics, and MAT2411 Differential Equations courses, which will be offered online during the 2026–2027 Fall semester, you must log in to the system using an email address with the std.yildiz.edu.tr domain via the link https://online.yildiz.edu.tr/Account/Login?ReturnUrl=/. After logging in, you can access the course you are enrolled in via the "My Courses" tab to participate in the course.