subjectTerm: I. MATHEMATICS AND COMPUTER SCIENCE_or_VI. %CE%91%CE%9D%CE%98%CE%A1%CE%A9%CE%A0%CE%99%CE%A3%CE%A4%CE%99%CE%9A%CE%95%CE%A3 %CE%95%CE%A0%CE%99%CE%A3%CE%A4%CE%97%CE%9C%CE%95%CE%A3 %CE%9A%CE%91%CE%99 %CE%A4%CE%95%CE%A7%CE%9D%CE%95%CE%A3__elauthor: Bratsos, Athanasios_or_Nikolopoulos, Stavros_or_Zachos, Efstathioslang: el