Address: Instytut Matematyki UW, ul. Banacha 2, 02-097 Warszawa, POLAND, tel. +48 22 5544402

Delta is a popular monthly (existing since 1974) devoted to mathematics, physics, and astronomy, primarily aimed at high-school students. (I.e., if you actually are a high school student, you should be able to understand virtually all our texts.) Among our writers (our readers, our friends) you will find teachers, students, math or physics olympiad winners, and top class University professors.