Julius Petersen (1839–1910)
Born 1839 CE, died 1910 CE.
Julius Peter Christian Petersen (16 June 1839 in Sorø, West Zealand – 5 August 1910 in Copenhagen) was a Danish mathematician. His contributions to the field of mathematics led to the birth of graph theory.
Text from the Wikipedia article Julius_Petersen, licensed CC BY-SA 4.0.