Jan Jansz de Jonge Stampioen
Encyclopedia
Jan Jansz de Jonge Stampioen (1610, Rotterdam
Rotterdam
Rotterdam is the second-largest city in the Netherlands and one of the largest ports in the world. Starting as a dam on the Rotte river, Rotterdam has grown into a major international commercial centre...

 - ca. 1690, The Hague
The Hague
The Hague is the capital city of the province of South Holland in the Netherlands. With a population of 500,000 inhabitants , it is the third largest city of the Netherlands, after Amsterdam and Rotterdam...

) was a Dutch
Netherlands
The Netherlands is a constituent country of the Kingdom of the Netherlands, located mainly in North-West Europe and with several islands in the Caribbean. Mainland Netherlands borders the North Sea to the north and west, Belgium to the south, and Germany to the east, and shares maritime borders...

mathematician famous for his published work on spherical trigonometry
Spherical trigonometry
Spherical trigonometry is a branch of spherical geometry which deals with polygons on the sphere and the relationships between the sides and the angles...

. In 1638 he moved to The Hague to become tutor of William II, Prince of Orange
William II, Prince of Orange
William II, Prince of Orange was sovereign Prince of Orange and stadtholder of the United Provinces of the Netherlands from 14 March 1647 until his death three years later.-Biography:...

. In 1644 he was employed to tutor Christiaan Huygens in mathematics. In 1689, he was a member of a panel set up to adjudicate a proposed solution to the longitude problem. His actual date of death is nothing more than a guess based on the last fact.

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