Ismat Beg, FPAS, FIMA, (Urdu: عصمت بیگ; born January 1951) is a Pakistani mathematician and researcher. Beg is a senior full professor at Lahore School of Economics, Higher Education Commission Distinguished National Professor and an honorary full professor at the Mathematics Division at the Ruggero Santilli Institute for Basic Research, Florida, US. He has an enthusiastic and interactive teaching style and is famous for saying “please come on the board” when posed with a question in class. This helps uplift the students’ confidence. Beg's scientific contributions cover a wide range of topics spanning fixed point theory and approximations, order structure, fuzzy sets and systems, artificial intelligence and multicriteria decision theory.