János Körner is a Hungarian mathematician who works on information theory and combinatorics.
[1] Körner studied Mathematics at the Eötvös Loránd University in Budapest with a degree in 1970[2] and was then at the Alfréd Rényi Institute of Mathematics of the Hungarian Academy of Sciences until 1992.
[1] Over his career, he frequently collaborated with fellow information theorists such as Rudolf Ahlswede, Katalin Marton, and Imre Csiszár.
Together with Rudolf Ahlswede and Peter Gács he proved the blowing-up lemma.
[2] He served as Associated editor of the IEEE Transactions on Information Theory on multiple occasions.