Borwein is a surname. Notable people with the surname include:
David Borwein (1924–2021), Lithuania-born Canadian mathematician Jonathan Borwein (1951–2016), Scotland-born Canadian mathematician and a professor Peter Borwein (1953–2020), Scotland-born Canadian mathematician and a professor
See also Borwein's algorithm, algorithm devised by Jonathan and Peter Borwein to calculate the value of 1/π. Borwein integral Bailey–Borwein–Plouffe formula, a spigot algorithm for computing the nth binary digit of pi (symbol: π) using base 16 math Erdős–Borwein constant, the sum of the reciprocals of the Mersenne numbers. It is named after Paul Erdős and Peter Borwein.