Arnold F. Emch (24 March 1871 – 1959) was an American mathematician, known for his work on the inscribed square problem.
Emch received his Ph.D. in 1895 at the University of Kansas under the supervision of Henry Byron Newson.
[1][2] In the late 1890s until 1905, he was an assistant professor of graphic mathematics in the school of engineering at the Kansas State Agricultural College (now Kansas State University).
[3] In 1905, Emch became a professor of mathematics at the Kantonsschule in Solothurn, Switzerland.
[4] In 1908, Emch gave a lecture at the International Congress of Mathematicians in Rome.