Teacher at the faculty of Mathematics-Informatics, Hanoi National University of Education (old English name : Hanoi Pedagogical University, French name: Ecole Normale Supérieure de Hanoï, Vietnamese name: Đại học Sư phạm Hà Nội).
However, I often ask stupid questions because of my low level of knowledge.
Q&A for professional mathematicians
Q&A for people studying math at any level and professionals in related fields
Q&A for students, teachers, and linguists wanting to discuss the finer points of the French language
Q&A for active researchers, academics and students of physics
Q&A for professional and enthusiast programmers
Q&A for scientific skepticism
Q&A for users of TeX, LaTeX, ConTeXt, and related typesetting systems
Q&A for linguists, etymologists, and serious English language enthusiasts
Q&A for students, teachers, and linguists wanting to discuss the finer points of the Russian language
Q&A for speakers of German wanting to discuss the finer points of the language and translation