Dietrich Stoyan (born November 26, 1940, Berlin) is a German mathematician and statistician who made contributions to queueing theory, stochastic geometry, and spatial statistics.
Stoyan studied mathematics at Technical University Dresden; applied research at Deutsches Brennstoffinstitut Freiberg, 1967 PhD, 1975 Habilitation.
In 2024, he criticized together with Sung Nok Chiu a wrong proof of the hypothesis that the origin of the COVID-19 pandemic was a market in Wuhan, which was published in the journal Science.
Successful joint work with Joseph Mecke led to the first exact proof of the fundamental stereological formulae.
Stoyan is very active in demonstrating non-mathematicians and non-statisticians the potential of statistical and stochastic geometrical methods.