Michael Darwin Morley (1930 – October 11, 2020)[1] was an American mathematician. Morley was professor emeritus at Cornell University.[1] His research is in mathematical logic and model theory, and he was best known for Morley's categoricity theorem.[2] He was born in Youngstown, Ohio
Morley died on October 11, 2020 in Sayre, Pennsylvania at the age of 90.[1]