На сайте Университета в который я хочу поступать на GradProgram выставлены следующие требования. Прошу разъяснить подчеркнутую часть в абзаце:
Admission Requirements
To be admitted, applicants should normally have completed the
equivalent of an undergraduate major in mathematics with at least fifteen units of upper-division or higher level work, including one
semester each of … [названия предметов]
Что имеется в виду под fifteen units of upper-division?
Заранее спасибо за ответы.
Upper-division courses are specialized, in-depth, and advanced, and emphasize problem-solving, analytical thinking skills, and theoretical applications. These courses often build on the foundation provided by the skills and knowledge of lower-division education. Upper-division courses may require the student to synthesize topics from a variety of sources. Upper-division courses may also require greater responsibility, or independence on the part of the student. Upper-division courses require instructors with specialized knowledge and preparation. Thus, many intermediate and all advanced baccalaureate courses in a field of study are properly located in the upper-division. In addition, disciplines that depend heavily on prerequisites or the body of knowledge of lower-division education may properly be comprised primarily of upper-division courses.