"Perhaps no one needs to be introduced to Obádovics J. Gyula's book Mathematics, which has so far gone through nineteen editions and has become a helper for many in the wonderful world of mathematics. The usefulness of the summary manual, which has been completely revised in the meantime, is proven by the more than 500,000 copies sold so far, as well as foreign Over the years, Obádovics mathematics has become a well-loved manual that is used daily.
The comprehensive nature of the book is shown by the fact that, starting from the primary school curriculum, it includes all of the secondary school knowledge, and also provides an introduction to higher university and college mathematics. In each case, well-chosen, detailed example material and carefully drawn diagrams help to understand the definitions and items within each chapter. Obádovics-mathematics can be an effective helper for both students and adults dealing with mathematics at any level, especially those preparing for graduation, entrance exams, and university or college students who have already been admitted."