books.google.com - One of the most effective ways to stimulate students to enjoy intellectual efforts is the scientific competition. In 1894 the Hungarian Mathematical and Physical Society introduced a mathematical competition for high school students. The success of high school competitions led the Mathematical Society...http://books.google.com/books/about/Contests_in_Higher_Mathematics.html?id=2wwXImJ2HocC&q=density&utm_source=gb-gplus-shareContests in Higher Mathematics