About Dénes Kőnig
Dénes Kőnig was a Hungarian mathematician of Hungarian Jewish heritage who worked in and wrote the first textbook on the field of graph theory. Dénes Kőnig (September 21, 1884 – October 19, 1944) was a Hungarian mathematician of Hungarian Jewish heritage who worked in and wrote the first textbook on the field of graph theory. In memory of their father, who died in 1913, Kőnig and his brother György created the Gyula Kőnig prize in 1918. In 1899, he published his first work while still attending High School in a journal Matematikai és Fizikai Lapok.
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.