Paco Axel Lagerstrom (February 24, 1914 – February 16, 1989) was a Swedish-American applied mathematician and aeronautical engineer. He was trained formally in mathematics, but worked for much of his career in aeronautical applications. He was known for work in applying the method of asymptotic expansion to fluid mechanics problems. Several of his works have become classics, including "Matched Asymptotic Expansions: Ideas And Techniques".
Provided by Wikipedia