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"Hieronymus Georg Zeuthen (15 February 1839 – 6 January 1920) was a Danish mathematician.
He is known for work on the enumerative geometry of conic sections, algebraic surfaces, and history of mathematics." - (en.wikipedia.org 11.08.2021)
(The left column lists the relations of this actor to objects in the right column. In the middle you find other actors in relation to the same objects.)