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Ismael Bullialdus (Boulliaud, Boulliau) (September 28, 1605 - November 25, 1694) was a French astronomer.
Born in Loudun, Vienne, France.
In 1640, he suggested that gravitational force follows an inverse-square law.
He died in Paris, France.
External links
- Short biography (http://www-gap.dcs.st-and.ac.uk/~history/Mathematicians/Boulliau.html)
- Longer biography (http://web.clas.ufl.edu/users/rhatch/pages/11-ResearchProjects/boulliau/bio-historical/06-b-michaud-1843-etc.htm) (in French)
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